Malicious PDF — malware analysis report

Static analysis result for SHA-256 33004bdc6585bdbb…

MALICIOUS

PDF

59.0 KB Created: 2020-07-29 18:06:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3ef0fa10098b6a8f30daca70385448bb SHA-1: 4d6ec1d0b5d1fc92d6eb37fc744ab971661fb75f SHA-256: 33004bdc6585bdbb66919a2152ed91c66bdc5b14dd868f53c3d98aa038a5505a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a large number of external links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link directs to a known malicious redirector. This suggests the document's primary purpose is to redirect users to malicious sites, likely for phishing or malware distribution. The document body itself is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

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=cefr+diagnostic+test+pdf In PDF document text
    • http://files.commsailpistakee.org/uploads/1/3/1/3/131381003/7255338.pdfIn PDF document text
    • http://files.creativebeginningsllc.com/uploads/1/3/2/6/132681359/wejodegezi.pdfIn PDF document text
    • http://files.blackgypsymamawagon.net/uploads/1/3/0/9/130969652/7376190.pdfIn PDF document text
    • http://files.thewanderingbays.com/uploads/1/3/1/0/131070112/rukavijeb_biziwet_buxaninumef.pdfIn PDF document text
    • http://files.acherrymoon.com/uploads/1/3/1/6/131636834/budaninulimete.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/1/0433/1179/2286/files/xajexiwebugusimumizegotix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3278/6597/files/35092565120.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/32331237993.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0593/4757/files/wexijumujod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1197/3026/files/30407479905.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5560/4134/files/78896267971.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6750/6845/files/94306246780.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5516/9182/files/41671098204.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2174/5825/files/31100019256.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2711/9784/files/wazuvitiledutadujonenofu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1576/6177/files/80976867707.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4751/6325/files/zawevifisixorudevivasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5458/8316/files/lanudasunovowamipakob.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: acherrymoon.com 5 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a9c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9C4 5104 bytes
SHA-256: d2aea040c9687c9f3e8e3ba01aecf0d76b9b29109fa4ebdb6f91761ef0c9e8c2
font_01_sfnt_off0000bb35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB35 10484 bytes
SHA-256: 95aae827dceba51d9dc260d9106f0667706127d7a1cebf19bb0f069bdc749622