Malicious PDF — malware analysis report

Static analysis result for SHA-256 316b5bd4337baaa5…

MALICIOUS

PDF

45.7 KB Created: 2020-08-04 08:46:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4f992437dca4c77f96f4f5f23df8a6e2 SHA-1: 9787238d272b9d0dccb07599feaba076d1804722 SHA-256: 316b5bd4337baaa5a0747c510d35140e2f9b868aac268309fafac00017a442ff
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a document about numbers in English. It also functions as a link farm, pointing to numerous other PDF files hosted on various domains, including Shopify. The primary malicious URL is https://ttraff.ru/pify?keyword=numeros+del+100+al+1000+en+ingles+pdf, which likely leads to further malicious content. The document body itself is heavily obfuscated and contains embedded URLs, but the heuristic firings clearly indicate malicious redirection and link farming behavior.

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.ru/pify?keyword=numeros+del+100+al+1000+en+ingles+pdf In PDF document text
    • http://files.kindactswarmhearts.com/uploads/1/3/0/8/130813100/fizakufulu.pdfIn PDF document text
    • http://files.computerrepairnerds.com/uploads/1/3/0/8/130813715/kuvuna.pdfIn PDF document text
    • http://files.eat-your-veggies.com/uploads/1/3/0/9/130969183/xixasebakimomo.pdfIn PDF document text
    • http://files.nancybmann.com/uploads/1/3/0/8/130813357/rawubanovusad.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/1/0432/8144/9118/files/77460031731.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2017/9864/files/jelivosujofi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7133/0709/files/bitej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1814/8261/files/konefupemosajev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4136/5922/files/77713868781.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1184/1958/files/15986554547.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4830/4797/files/27269032246.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5082/6905/files/irc_college_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6513/0660/files/css_media_queries_desktop_first.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/zolarafowubiwonoze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/bellbirds_poem.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_off0000656c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x656C 5524 bytes
SHA-256: c6f7c322c9f30b1d0b36909b4fb1c00a6cdb2e12cd13692798e0673891b2ed45
font_01_sfnt_off00007820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7820 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off000080ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80AE 11940 bytes
SHA-256: 860796b1ce98de65cfde059de26848bbed7721139a442418ee30a973191dd438

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