Malicious PDF — malware analysis report

Static analysis result for SHA-256 3518636fb9f7fd5d…

MALICIOUS

PDF

32.2 KB Created: 2020-08-23 14:10:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b96c638787ff1c3b8cd4ac71d1f8a3ab SHA-1: 57aab11b69a28d570a9f30b4dad5babe9a4dd797 SHA-256: 3518636fb9f7fd5d84fd7be505c08ec4adf96c3d6d080abd33c649dbf91d9d92
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The presence of a malicious redirector suggests an attempt to lure users to a malicious site, likely for phishing or malware 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.cc/pify?keyword=gatling+gun+sound+effect In PDF document text
    • http://dolur.bearhugquiltworks.com/uploads/1/3/1/4/131438177/wexutuxub-lidiwep.pdfIn PDF document text
    • http://mopafusig.sainttheresaattleboro.org/uploads/1/3/1/3/131381428/rojoruvezavipokazeg.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/1/0429/5622/6716/files/kopidejujipa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0200/1570/files/bowmasters_mod_game.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5370/3590/files/96875943356.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5730/7039/files/85248589276.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8800/2710/files/62415171115.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2114/8061/files/multivariate_normal_distribution_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4994/2176/files/rozexapofoduwafizowiwifa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2281/0268/files/34278418708.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0467/3699/files/arupu_song_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4847/6572/files/asvab_mechanical_comprehension_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2969/2577/files/sesidowibupav.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: bearhugquiltworks.com 3 samples

Related samples 2

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_off000042d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x42D5 5124 bytes
SHA-256: da5e5f03763a5680e604b0145d4eb3a1b27cef51e17c811abbea28d0223b81da
font_01_sfnt_off0000545d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x545D 9392 bytes
SHA-256: 09ba18cd542965bc297ef04c083a2e8ed94f341cf4cc6fa697f539ee213c5754

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