Malicious PDF — malware analysis report

Static analysis result for SHA-256 87e7952c562af3b4…

MALICIOUS

PDF

35.6 KB Created: 2020-08-25 09:05:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 541fc2f4c214c5e7f9bb74726decd24f SHA-1: dc9ddf4683c2da971f6e4942f6025e5b60a3e98e SHA-256: 87e7952c562af3b4b63dac4c70ba5aebded73329d540049e2ece3638a9ddde0c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to Shopify domains hosting other PDFs, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning tactic to distribute malware or phishing content. The ML classifier strongly supports the malicious nature of this PDF.

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=arcsoft+webcam+companion+for+sony+vaio In PDF document text
    • http://majaro.foothillsphotogroup.com/uploads/1/3/0/8/130814328/7803910.pdfIn PDF document text
    • http://files.stelizabethjulian.org/uploads/1/3/1/8/131871814/warorit.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/1/0428/9835/8432/files/3785448733.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2459/6642/files/sosifirebiko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3768/7962/files/vusije.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3144/5149/files/conceptual_physics_fundamentals.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8154/7424/files/balance_of_payment_lecture_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0267/2798/files/94639879194.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0576/9888/files/86065696459.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4946/8582/files/25312678626.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6231/3631/files/22079107056.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3995/4856/files/49998285923.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6130/4728/files/47180422593.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2359/7725/files/winubituzokevijozod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6930/8061/files/fefagifidaxazuxupim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7514/1783/files/java_programming_array_example.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
🗂 Part of campaign: foothillsphotogroup.com 4 samples

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_off00004d54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D54 5512 bytes
SHA-256: 9ee271fc64429e310dff819502656d50e6bf509c22d9b408b0724c840b0d4a9f
font_01_sfnt_off0000600b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x600B 9800 bytes
SHA-256: 73b81a5703cde003b8528ac9248a46f8002253d9e1423a5a79dae6bdbae0ba38

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