Malicious PDF — malware analysis report

Static analysis result for SHA-256 2555ffb63bc7533e…

MALICIOUS

PDF

43.5 KB Created: 2020-07-25 05:27:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 18daeebb882642f097c769718c2f59b0 SHA-1: a0ec41218f83de1d4e4e1d11d23e98667b0682fc SHA-256: 2555ffb63bc7533e3254c1dabc9f8a9962469260016c8f1f3cf64febdc986525
182 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link and a link farm, indicating a phishing or scam attempt. Additionally, a callback lure heuristic suggests the document prompts the user to call a phone number, consistent with tech-support scams. The embedded URL points to a redirector, likely leading to further malicious content or phishing pages.

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.
  • 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) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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.com/pify?keyword=wapking+song++dj In PDF document text
    • http://files.schreinerarbeitenbuechler.com/uploads/1/3/1/3/131380052/1109442.pdfIn PDF document text
    • http://files.photosbyjoierey.com/uploads/1/3/1/4/131453276/2764440.pdfIn PDF document text
    • http://files.hiddenvioletsconsulting.com/uploads/1/3/1/8/131856173/juwunimo-sutudowamujunuk-sevewafopol-pebekol.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/1/0428/8066/3705/files/sifivenawiwabasezoso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6296/8991/files/56312199128.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9229/6358/files/mudabe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3142/8248/files/42497180282.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2522/5112/files/79540651103.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0767/9397/files/2333705494.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9894/8255/files/zogezewadapunexeverotif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7926/2623/files/96976153000.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zaduvezumutup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3929/3589/files/94804055133.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3557/4943/files/vunafejin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31906594002.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4978/7285/files/fagovazexononarojoser.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 5

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_off000065aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65AA 4740 bytes
SHA-256: 537f5806b2176f756bcadfcbaa45ad260152d62d5d16821a0c2b1ed5b41d6a57
font_01_sfnt_off000075d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75D5 13732 bytes
SHA-256: ecde5de92989d5925e034b5ea502e18cb58bf69a8c35146ff7646897ef056db8

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