Malicious PDF — malware analysis report

Static analysis result for SHA-256 388817fd0343e0e9…

MALICIOUS

PDF

42.6 KB Created: 2020-08-19 08:01:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f6bf3cc055ac0463f45b6c6a530cbca1 SHA-1: 74dcc563b6157e2bcb083fae386edbc0eed7997a SHA-256: 388817fd0343e0e987ca479934f6f939e87693b7cf9572ea2d92f8017a172774
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, directing users to 'ttraff.ru'. This URL is presented within the document body, disguised as a 'bibliography apa format generator'. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.ru/pify?keyword=bibliography+apa+format+generator In PDF document text
    • http://keger.sojofireproject.org/uploads/1/3/0/7/130739777/446072.pdfIn PDF document text
    • http://mabulafaf.csze-cake.com/uploads/1/3/2/6/132681834/fakifav.pdfIn PDF document text
    • http://metinotod.foragersharvest.com/uploads/1/3/0/8/130874601/tonigij_lobonidi_bekavoboniki_gomisogimajuta.pdfIn PDF document text
    • http://files.karenelenajames.com/uploads/1/3/0/7/130776277/2901245.pdfIn PDF document text
    • http://files.socialclubofsp.org/uploads/1/3/1/4/131437421/xufukurepafik-vikesevozekuwo.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/1/0430/2821/8019/files/sanuzokirevox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4293/9814/files/wozebenogav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0118/2370/files/busofuji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/4797/1990/files/zitupebakorogajawolonil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5805/9674/files/payment_systems_and_services_act_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9607/1589/files/74114661790.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6773/6225/files/tuzuwisetudej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4329/9234/files/vezopokixawuroba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6549/1107/files/81703450284.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6171/3813/files/vidmate_app_install_new_version_2017.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

Related samples 4

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69AE 5428 bytes
SHA-256: 2ab2e3a2bc96ecb448d7880f8fd26ffa97db92b1e03ea4b0eefc7b85246b2beb
font_01_sfnt_off00007c03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C03 9620 bytes
SHA-256: d9e4f38303b77afddd135f01be1d08597f0cecbb95faa9288842a5b87d260a79

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