Malicious PDF — malware analysis report

Static analysis result for SHA-256 b55684809072424c…

MALICIOUS

PDF

42.8 KB Created: 2020-08-03 00:42:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7acff5a3a0798a09d0b82459b766b989 SHA-1: 39bb5282560c49ee058ea3b5db1a3af19fa85cbe SHA-256: b55684809072424c9d1f03ea96d2d715b353f3e1e50c2d7ca39bd31362f20913
214 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious URL, identified as a redirector for phishing campaigns. The document body text and heuristics indicate a lure related to 'Adobe membership cancel', likely a phishing attempt to harvest credentials or redirect users to malicious content. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=adobe+membership+cancel In PDF document text
    • http://files.toddmcadam.com/uploads/1/3/0/7/130740231/zizibotozuxudog.pdfIn PDF document text
    • http://files.segarraproductioninsuranceservices.com/uploads/1/3/0/9/130970003/zajoju_sifowizufat_danulemet_bujifez.pdfIn PDF document text
    • http://files.dmrfarms.com/uploads/1/3/2/7/132740997/2d97f.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/1/0431/2947/1130/files/fomuda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1218/4474/files/buletogefugomonefopafo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2748/1255/files/weribetoxodiwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9919/9390/files/53206150098.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3720/3364/files/11035981761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3152/7575/files/91586326700.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1988/7001/files/92955230504.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0496/6565/files/l118_john_deere.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6990/5825/files/21716292318.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4257/0401/files/lufelog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2962/6017/files/dopolupipuw.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 1

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_off0000676a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x676A 5444 bytes
SHA-256: 0ca3d14cce844f84ff4071b8c0b70142a7b09dbbae2bd611db54f0920b32dbaf
font_01_sfnt_off000079b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79B5 10616 bytes
SHA-256: 3380070881fa93c502940801084ce0f8e51f013d04a013c6ae75efd6d4fb2057

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