Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1b2fec1d20f5f35…

MALICIOUS

PDF

42.8 KB Created: 2020-08-06 22:24:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 62ce1b2b7692d21845247b0632054472 SHA-1: efd1daf71a33eaedca33eb83d82409879968919c SHA-256: b1b2fec1d20f5f35c81265a35b13843fb20b0af922c91c1d7027cdff3fe1647e
194 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to external resources, a technique often used for SEO poisoning or link farms. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is designed to obscure the final destination. The document body, though heavily obfuscated, contains URLs that are likely part of this link farm. The primary attack vector appears to be tricking users into clicking these links, leading them to malicious sites.

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.cc/pify?keyword=piezoelectric+actuators+and+ultrasonic+motors+pdf In PDF document text
    • http://files.hulowmedical.com/uploads/1/3/0/7/130776646/pularupavojab.pdfIn PDF document text
    • http://files.winema.org/uploads/1/3/2/7/132712333/c96808daaf85.pdfIn PDF document text
    • http://files.singwithbscs.org.uk/uploads/1/3/1/3/131383294/10206dcea3c48.pdfIn PDF document text
    • http://files.potterplacefarm.com/uploads/1/3/0/7/130775431/1009491.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/1/0435/6512/1695/files/wobuleg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1361/0392/files/zetotalefejanonevenixad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89832202682.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6481/9874/files/gusinufojibuxuvosuwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6272/1688/files/jukebox_minecraft_recipe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0859/6900/files/xefuxafazij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3504/1702/files/giloxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/fadululixevofofono.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6130/5756/files/92459363350.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1786/1280/files/43944709857.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 2

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_off00006943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6943 5352 bytes
SHA-256: 473fc2a5c62125cdd5a1ece434706aec483098138a86d65a0f64e63d2d606ab6
font_01_sfnt_off00007b69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B69 10108 bytes
SHA-256: cb000bf2f87db6ebebe011b50c3783e74a0bd067276b58d89e49e261fd84d3a5

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