Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec61f77abf44b21b…

MALICIOUS

PDF

42.7 KB Created: 2020-08-07 17:25:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6adbac5aed2e8ded4b7905b3958584af SHA-1: a944572b937b8e10b18c859046e9c3f4c5c71a28 SHA-256: ec61f77abf44b21bd0e72172d12146cf5522b0c3cb3241b5f4f81ea8b1c13702
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link redirects to a known malicious URL. This indicates a social engineering attempt to drive traffic to malicious infrastructure, likely for further exploitation or phishing. The document body itself is largely garbled but contains the title 'Acidimetry and alkalimetry titration in non aqueous titration pdf' and the malicious redirector URL, reinforcing the lure.

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=acidimetry+and+alkalimetry+titration+in+non+aqueous+titration+pdf In PDF document text
    • http://files.mollymcdavittcounseling.com/uploads/1/3/1/3/131398479/5997011.pdfIn PDF document text
    • http://files.myentouragemusic.com/uploads/1/3/0/7/130776346/tabaxunolux-kobetosererig-nuzivinaken.pdfIn PDF document text
    • http://files.toowoombakoalarescue.org/uploads/1/3/1/4/131438563/5bf7a52f4d.pdfIn PDF document text
    • http://files.chattaction.org/uploads/1/3/0/7/130775027/wedurixivib_bumumon_vibilamed_devatipo.pdfIn PDF document text
    • http://files.vistadellagofootball.com/uploads/1/3/1/4/131452733/5314567.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/1/0429/6635/2025/files/44302543643.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7906/6009/files/17464237678.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zurutadodusabexefiba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7668/1882/files/47144166042.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8451/3444/files/79357380505.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3258/4087/files/54622314884.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9938/2170/files/zekuvirojiboz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5689/0013/files/8560916389.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4211/1637/files/91880381650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81988232477.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1279/1192/files/girl_fucks_dogs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1540/3682/files/lijekenifopupadu.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 7

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_off000067a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67A2 5584 bytes
SHA-256: 26cb94f4f2891844d97595e9c9e3237d1dc096e81ec562eba870396997d86822
font_01_sfnt_off00007a8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8E 10176 bytes
SHA-256: afb2450cfd3aa30bffddf1a370c20c910eccbf358b868285fe75159a30239151

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