Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0abaa2f65c20d77…

MALICIOUS

PDF

45.5 KB Created: 2020-07-24 10:12:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 9df3c767b5cf79ffda3915ce46fb270c SHA-1: 29cfbaab112195c65de7cbc658e2daacdea6438a SHA-256: a0abaa2f65c20d77c9782a89b84c46fae4e27e1306b8a64a260a505ca8ec4bc9
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com', disguised with a keyword related to medical treatment guidelines. It also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on Shopify. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, appears to contain metadata related to the lure and the tool used for generation.

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/wb?keyword=diabetic%20nephropathy%20treatment%20guidelines%20pdf In PDF document text
    • http://files.theparksphysie.com/uploads/1/3/1/4/131406498/dazutosuv.pdfIn PDF document text
    • http://files.dakinigoddessofmarrakech.com/uploads/1/3/0/7/130775825/2490174.pdfIn PDF document text
    • http://files.philipmartoglio.com/uploads/1/3/0/8/130815437/fuzof.pdfIn PDF document text
    • http://files.oiemi.com/uploads/1/3/2/8/132814306/zufeveluxaz-maganofuwago-kimomuxanal-dajaro.pdfIn PDF document text
    • http://files.stephenieayoung.com/uploads/1/3/1/4/131453623/782c12bcd2a3b0.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/1/0436/7033/9737/files/nosirovebilatotit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7680/3990/files/66016479226.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3273/1038/files/57043239089.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/sanumizig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9241/8468/files/luwef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3759/5560/files/23966029361.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2758/6457/files/lefimuropifefuxozuxel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0516/5216/files/60570389162.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1035/1513/files/lamaxikuxugexaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9295/9642/files/62528340935.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6416/4506/files/kuzuwivezafu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8910/0951/files/pimitagubamuxomexela.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 7

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_off000072a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72A6 5692 bytes
SHA-256: a6edc2254f70a5138c90c04a1cc8282ba5c5a2b83a9c5c6c4bc826ccc7f0c7d4
font_01_sfnt_off000085d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85D0 10192 bytes
SHA-256: ae4e395fd7a2aa95e8c7c895d6c7b67fd543f8a0e9f9a7ae8ab7086f83e605eb

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