Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7a4eedaeac77740…

MALICIOUS

PDF

34.5 KB Created: 2020-08-02 14:31:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 57bb200d79be7e3361ecb3f8bd780a65 SHA-1: 8851892c2c410c8e1a15f264c7be4f220ad1ff1c SHA-256: b7a4eedaeac777401cdce1e8202ab9463cd4cc3177c7bce3e46a2097771a0147
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link that redirects to a known malicious domain, disguised as a physics laboratory manual. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, and PDF_SEO_LINK_FARM indicates a large number of outbound links, many of which point to benign Shopify URLs, likely to improve search engine ranking for the malicious redirector. No scripts were extracted, but the embedded link is the primary indicator of malicious intent.

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=physics+laboratory+manual+loyd+solutions In PDF document text
    • http://files.ingridlavoiepapercutting.com/uploads/1/3/2/7/132740462/831a1abfdac1e.pdfIn PDF document text
    • http://files.multiplicitycreations.com/uploads/1/3/1/4/131406321/gifavavedefek.pdfIn PDF document text
    • http://files.smile-movement.com/uploads/1/3/2/8/132814463/1611b54cf6.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/1/0428/9835/8432/files/74832969368.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2965/0843/files/65455779462.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2561/3479/files/55007541619.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4536/3610/files/nizafolunagevoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3067/3565/files/kilapebizuko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8077/7882/files/event_coordinator_resume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8827/2805/files/sirusefunizavofiwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1389/8403/files/80832459932.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6903/1078/files/82665147332.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/28319481241.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5086/9671/files/xufesaxemulomovomito.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/23631451812.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 8

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_off0000491b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x491B 5424 bytes
SHA-256: 504820dcbd703d59e226e67782753af9498c623ff50e96e5335822ab408ab735
font_01_sfnt_off00005b5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B5C 9868 bytes
SHA-256: 254751729e91c0d40087cbc36db2eada2df4f75b4d36482a09c66f1518237a10

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