Malicious PDF — malware analysis report

Static analysis result for SHA-256 af8951126e0b7575…

MALICIOUS

PDF

35.6 KB Created: 2020-08-01 04:46:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 89977cdf29b9fe4610e6e91b257ee247 SHA-1: af5bea88784ce982999dc95eab9e7748ec1df323 SHA-256: af8951126e0b7575a578672ce232e2c8133497de34ee0a3863a4a40aa95ff505
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, identified as a PDF link farm. One of these links, 'https://ttraff.ru/pify?keyword=cen-+tech+p37772+manual', points to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a manual title, suggesting a lure to trick users into clicking the malicious links.

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=cen-+tech+p37772+manual In PDF document text
    • http://files.rhosarts.com/uploads/1/3/2/6/132695372/kuxuga_baliwevavavawiw.pdfIn PDF document text
    • http://files.waiapukidshomebased.com/uploads/1/3/0/8/130813448/juxij.pdfIn PDF document text
    • http://files.pvpressnewsletter.com/uploads/1/3/0/9/130969992/toragopisazovuxok.pdfIn PDF document text
    • http://files.exmouthcaninecentre.co.uk/uploads/1/3/0/8/130874128/jenasaj.pdfIn PDF document text
    • http://files.advent-baltimore.com/uploads/1/3/2/7/132741162/6605318.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/1/0434/2287/5797/files/kikimiwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7341/4055/files/rudixupe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67768868558.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5815/7982/files/45175891340.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5715/1142/files/11735801721.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1128/4893/files/sikaniju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9740/0223/files/tipamukutipujozeroles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1724/8672/files/xojeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6717/1223/files/38462315493.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_off00004ef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EF2 5212 bytes
SHA-256: 781ece2d68241008fe7452378a62603ae8afaedfc9b16dd867abec7ae2dfad4c
font_01_sfnt_off00006095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6095 9712 bytes
SHA-256: b7c255d36d6c8b12a51a4bda480026672d47a1c1a19c197daef6a943136e1024

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