Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b8be426d0944fe7…

MALICIOUS

PDF

46.1 KB Created: 2020-08-11 03:23:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8b459508b53a7d0dfafa38bb1ffb2283 SHA-1: d4a87eaaaa2283b5de621b1a3a07620cc2b38277 SHA-256: 4b8be426d0944fe7ca046ebdf32ecd6d1ad0d259db6722e44bb02df22d70a485
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic firing indicates a link to a known malicious redirector at ttraff.com, which is used to deliver the final payload. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to download further malicious content.

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=basic+electrical+engineering+questions+pdf In PDF document text
    • http://dibux.theconcertspot.com/uploads/1/3/2/7/132740494/virilidowawivajozo.pdfIn PDF document text
    • http://files.veranijveld.com/uploads/1/3/0/8/130814232/fugixakewakunokol.pdfIn PDF document text
    • http://files.handystansplumbing.com/uploads/1/3/0/8/130873728/6183284.pdfIn PDF document text
    • http://files.encourage-fmhs.info/uploads/1/3/2/6/132683140/6447267e.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/1/0432/6037/9286/files/66297173649.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4281/5643/files/teoria_finalista_mitigada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/9626/4094/files/pan_card_date_of_birth_affidavit_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1534434062.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3016/8230/files/53332630063.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8358/6977/files/70667012008.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1261/8402/files/dosinuzikewomufez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8153/9489/files/65195381169.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2961/1171/files/difosefebev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8910/0951/files/19870629420.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_off000073ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73EE 5500 bytes
SHA-256: 3a4b7628ae1062417980f748ee82d0ddc79f84ba99f88d8451656f1a2850ad75
font_01_sfnt_off0000869b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x869B 10692 bytes
SHA-256: 69894bf2be42b4bfc33313541943b4689316175288e05d610f45099f789e02e8

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