Malicious PDF — malware analysis report

Static analysis result for SHA-256 e31bddac40726545…

MALICIOUS

PDF

108.6 KB Created: 2020-08-21 21:38:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4fe9511206f8aecce22861c95a729918 SHA-1: 6fb3e4acd586d278b0981af3b723bb7424e673c1 SHA-256: e31bddac407265451efd8f85fe106e8260b15d2a3a20f56ffc64a05377f27dc5
194 Risk Score

Malware Insights

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

The PDF file contains a link farm and a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a 'complete neuro exam template'. The primary malicious IOC is the redirector URL, which is likely used to host further malicious content or phishing pages. The presence of numerous links, many pointing to Shopify, suggests an attempt to obscure the malicious destination and potentially leverage benign domains for initial distribution.

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=complete+neuro+exam+template In PDF document text
    • http://files.eponaequestriandesign.com/uploads/1/3/2/6/132696174/gabujitad.pdfIn PDF document text
    • http://zexar.derechinstitute.com/uploads/1/3/0/7/130738847/jafevi_dazewur.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/1/0428/3187/2166/files/50852648406.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0288/8351/files/22800326868.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0009/3083/files/chrome_version_76_for_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8039/3639/files/justin_bieber_sorry_free_mp3_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/alpine_mini_split.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/kosiromelalajo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/norovirus_outbreak_management_and_disease_prevention_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/3831/9527/files/71006567366.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3427/0117/files/77207376851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9226/3583/files/12730061653.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6355/8815/files/ssc_hall_ticket_2019_telangana.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 3

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_off000171c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171C3 4760 bytes
SHA-256: 6df97b93b7fefbe20cad66bb728c1d7336a8a8eb5773b42b161686f2c492b790
font_01_sfnt_off000181d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x181D7 10376 bytes
SHA-256: 011230dff75307a4ab3449d544ff0f1491fe48a914e38419bda74d7585fa04d1

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