Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7c1749d641ffbd0…

MALICIOUS

PDF

41.2 KB Created: 2020-08-12 05:13:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cdcec93a9730f0f8ed9d31d5b97e5419 SHA-1: d5232bcf106958bf3b5f8f1ff75252593f81731d SHA-256: b7c1749d641ffbd067daf26cc6788d7c9f21dde0a0a5f63f2322d4b2b7391a81
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a 'personality test for careers pdf' and the malicious URL. The ML classifier strongly indicated maliciousness, and the PDF structure includes a link farm, suggesting a phishing or redirection attempt.

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=personality+test+for+careers+pdf In PDF document text
    • http://pujupep.lifetransformationgroup.com/uploads/1/3/2/6/132695569/d2eb7fdfc2b.pdfIn PDF document text
    • http://files.losalcouncil.com/uploads/1/3/0/8/130814007/28d845e.pdfIn PDF document text
    • http://files.immanuellutheranchurch.org/uploads/1/3/0/7/130738576/3775625.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/1/0432/8849/4236/files/avancemos_level_1_textbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4436/3678/files/75280330984.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1643/8438/files/73785383214.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5725/8395/files/collections_in_java_with_examples_with_coding.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2134/2619/files/86039577350.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/liwukepurenugiweda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3500/7893/files/68582800829.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4571/5109/files/38264204582.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2807/0052/files/tratamento_de_candidiase_recorrente.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7706/5121/files/manual_mitre_saw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0355/8564/files/55833121988.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 3

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_off0000647a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x647A 5252 bytes
SHA-256: 7fdb1ce99c2764e79f9698823762d5875c1f48cdc7a08fbaa91369ba1a632b9b
font_01_sfnt_off00007665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7665 9852 bytes
SHA-256: 4ce29640269c1bf4e56c987580ccc00dc734666dfbc45f5f53743b6a89cfc0bb

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