Malicious PDF — malware analysis report

Static analysis result for SHA-256 5126960986b8a121…

MALICIOUS

PDF

34.3 KB Created: 2020-08-22 02:56:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0bf722fefa72020274a0d0c9ec53dd99 SHA-1: ea087c84abd2e1edfb12e79b6be76300c5662e88 SHA-256: 5126960986b8a1217a3f291f618832fd5da1e3104e50d9edda64a1c90f2a8954
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 external PDF files hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is used to lure users with content like 'branches of government worksheet 2nd grade'. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same redirector URL and a similar 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.com/pify?keyword=branches+of+government+worksheet+2nd+grade In PDF document text
    • http://files.hathawayfarms.com/uploads/1/3/0/7/130776164/8ce56045fd10c.pdfIn PDF document text
    • http://nipixilo.katelyncostello.com/uploads/1/3/1/8/131856394/505951.pdfIn PDF document text
    • http://files.sandiegocsi.org/uploads/1/3/1/4/131437873/2053c3632.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/1/0431/0705/7825/files/62384267255.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9186/8310/files/dopopevawowurufigixijakut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6041/0006/files/50238491496.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5258/1542/files/36279584067.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2521/1298/files/solved_quantitative_aptitude_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/8959/5287/files/ajax_get_all_form_data.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7096/3360/files/color_by_number_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6764/5852/files/lakugujevemolenos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97503793953.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1592/7965/files/vubuputige.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6966/8517/files/14847843406.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1009/7313/files/mefexeriguxines.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 6

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_off00004609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4609 5800 bytes
SHA-256: 2a87a472a631f05df73e25ed7b77237e50cf09ec64d4ab6b96a7e89fa395e894
font_01_sfnt_off000059b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59B0 10032 bytes
SHA-256: b0e08f4ddbb9d509424ed5c8fa4113714c5abac24d2cde7ab1f517142b43c227

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