Malicious PDF — malware analysis report

Static analysis result for SHA-256 8179f50adb6bdc54…

MALICIOUS

PDF

42.9 KB Created: 2020-08-07 01:20:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a04fe1eca3b0126215563acfe7528816 SHA-1: 908487d48c7c78a1c9bee95a8fc5c5f6a9d9126d SHA-256: 8179f50adb6bdc54ef6184ae00a62da60dcca8e8d4c3680572c6d61c75b011a0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, many of which point to a redirector service known for malicious activity. The document body, though obfuscated, contains a URL that is also present in the heuristics, indicating a phishing or scam attempt disguised as a book download. The ML classifier strongly supports the malicious verdict.

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=bernardo+barranco+libros+pdf In PDF document text
    • http://files.summersautomotivedetailing.co.uk/uploads/1/3/2/3/132302764/beziwum.pdfIn PDF document text
    • http://files.acupunctureworksvt.com/uploads/1/3/1/6/131637419/kiroweroz-borotoburugo.pdfIn PDF document text
    • http://files.quetzalbirth.com/uploads/1/3/1/4/131455722/nijogobapuzu_vipabikisel.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/1/0433/7877/0076/files/mudegesofev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8866/7034/files/76543296340.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5106/5243/files/dadilex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5681/6540/files/rirofader.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/43451770398.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2709/5967/files/90437737215.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9088/6312/files/65914550517.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0931/8813/files/dorusareluxeteke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5350/5946/files/wapetezovugurebogobip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8334/2748/files/90941764625.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1910/7480/files/dutekofozejizusesej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1307/0238/files/litawilodixajoferaji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0514/1411/files/94762864801.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_off00006786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6786 5336 bytes
SHA-256: 86ac59c861b1edde3b93d2f6ca8e9784d3ebbb1759696d11de95fe70fc391de7
font_01_sfnt_off000079b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79B5 10864 bytes
SHA-256: 8b0d7e1ea959f5e981ee411f93b0e25e45fbf3b864fa59a2e7c8c25459eb1e0d

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