Malicious PDF — malware analysis report

Static analysis result for SHA-256 71cabcd2742b46aa…

MALICIOUS

PDF

46.3 KB Created: 2020-08-09 03:17:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e1480c66ed01d2ee0f82c1e070bda740 SHA-1: ef65d79ae73d39be59e1e55c5fb3793e5429b8bb SHA-256: 71cabcd2742b46aa6714c29af7df832ced969de55daa817d46d27d87940ec7d3
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to a redirector URL, suggesting a phishing or malware distribution scheme disguised as a free ebook download. The presence of a fake invoice lure heuristic further supports this. Although no scripts were explicitly extracted, the PDF structure and embedded links indicate malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=online+ebooks+free+download+pdf In PDF document text
    • http://rafote.martinaobrien.com/uploads/1/3/2/6/132683165/pukipebogenoxufaf.pdfIn PDF document text
    • http://difiv.sparkd.shop/uploads/1/3/1/4/131453870/d6bb4b7a.pdfIn PDF document text
    • http://files.thirdstreetchurchofchrist.org/uploads/1/3/0/7/130775868/defavaxoz.pdfIn PDF document text
    • http://files.mogsu.org/uploads/1/3/2/7/132740214/rofurulu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6674/4216/files/alter_ego_3_tests.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6870/3398/files/career_opportunities_after_10th.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0379/7913/files/31469321815.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3075/8054/files/tosedesagajomusewu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3218/0893/files/15618627221.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4158/6332/files/salorazowifipagi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2644/0607/files/59060743597.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3664/7317/files/naxiwepet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/30233375858.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5351/3881/files/77945047173.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5311/2735/files/pejezokipiravosowidisow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4819/6506/files/wepewifarajedemewilar.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68F5 5064 bytes
SHA-256: 67b5d4b426fe870acce54328d46705bd8e3c6d0f646bf2a24b5ce37eeadc3c88
font_01_sfnt_off00007a3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A3D 10524 bytes
SHA-256: 2f8650c3744869f4853595a528bfa426a4b28867bfd52283a3e33a495c72bc76
font_02_sfnt_off00009e1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E1A 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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