Malicious PDF — malware analysis report

Static analysis result for SHA-256 439f4b42b222e5ab…

MALICIOUS

PDF

40.1 KB Created: 2020-09-17 16:33:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 68d662aa2c8855de63c16e80191fd035 SHA-1: a15e93e0dc7eedd4e0d56704fed46c1d1d0472dc SHA-256: 439f4b42b222e5abc5575e508be0de6c2f7c32c64f57801e4ebad97b79643978
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of the primary links directs the user to a malicious redirector at ttraff.club, disguised as a search result for 'wiiflow black screen usb'. This indicates a social engineering attack designed to drive traffic to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.club/wix?keyword=wiiflow+black+screen+usb In PDF document text
    • http://vikuwag.theinstituteofadvancedmedicalesthetics.com/uploads/1/3/0/8/130873982/8359469.pdfIn PDF document text
    • http://files.azuriah.com/uploads/1/3/0/8/130874554/1036139.pdfIn PDF document text
    • http://sizibawo.kcbrewandchew.com/uploads/1/3/2/6/132695818/83eddda8e3f.pdfIn PDF document text
    • http://files.simonbland.com/uploads/1/3/0/7/130739809/batiji_sebowu_dadubuj.pdfIn PDF document text
    • http://subotu.catcaricature.studio/uploads/1/3/1/3/131398252/xurutizidumirebox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8026/9462/files/malunuseruve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6402/4479/files/daiana_guspero_edad_de_la.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5738/8439/files/devebigopedarawajibag.pdfIn PDF document text
    • https://a6d7c4f9-d6f9-4277-a92b-4b4125fb6f1e.filesusr.com/ugd/610d21_42b54617e6754e8fbaaa19bdeece7de3.pdf?index=trueIn PDF document text
    • https://66ef0408-8a3e-45e0-9d83-c323e37c6610.filesusr.com/ugd/594ae5_30bb8988ac60484face6a800e4668901.pdf?index=trueIn PDF document text
    • https://677d1094-5559-463c-9eea-dbaf01306450.filesusr.com/ugd/f1d680_ed478d8c3b1748e89316bcccbf7b94a4.pdf?index=trueIn PDF document text
    • https://2d9f3f8c-af43-416d-bdc7-c23b679484d3.filesusr.com/ugd/c63dba_4e6c15ab3afa482fad21e2df1e8704dd.pdf?index=trueIn PDF document text
    • https://4243300f-2c5c-4e50-8cd7-4ae6a3eb0bca.filesusr.com/ugd/7d2910_f5fa3fa599444c3d9a3a4c4ee4b4ba8b.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4556/0220/files/96158851306.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9000/9502/files/xijubaxulinodinusemi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3952/1958/files/food_stamps_nyc_income_guidelines_2018.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4902 5184 bytes
SHA-256: 9c5aeabac5035ec9f44a9d1c53c53d9c6edcc08fe25649f9fea739ce3affa842
font_01_sfnt_off00005ad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD6 10344 bytes
SHA-256: 2b45e49e74c58cd775c75b640bd880561b6e0e4fdba225274b352cc24a8b2252
font_02_sfnt_off00007e73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E73 16068 bytes
SHA-256: 5d72d630640305d452d914085fd6c65e0d8125198bed8028c282d44fd0327be8

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