Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0009bffe31fe2bf…

MALICIOUS

PDF

44.0 KB Created: 2020-08-03 10:18:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db07d2c49c61e4870553d0024ac73123 SHA-1: b8410c3f88ff3c73cac370bd02ca03cd6cc35c64 SHA-256: d0009bffe31fe2bf223dd49e4eec24588e5e81e0d67c388d35c9bd1aabadd2e4
152 Risk Score

Malware Insights

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

The PDF contains a high density of embedded links, with a critical heuristic firing for a link farm. One of the primary links directs to a known malicious redirector, 'ttraff.com', which is likely used to distribute further malicious content. The document body itself is largely obfuscated but contains the same malicious URL. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=beautiful+akon+lyrics
    • http://files.jenniferhelenadams.com/uploads/1/3/1/3/131380848/cc6961beec9.pdf
    • http://files.foryoureyestoeat.com/uploads/1/3/0/7/130739646/1148078.pdf
    • http://files.hometowncomfortstation.com/uploads/1/3/2/3/132302872/4624223.pdf
    • http://files.rileytimmermusic.com/uploads/1/3/1/1/131164431/9d8d9bf3f.pdf
    • http://files.carlosmunozdesigns.com/uploads/1/3/1/4/131438490/xadefekozefiweb-dumogine-boxuroxej.pdf
    • https://cdn.shopify.com/s/files/1/0435/0600/8216/files/laxubigivatodonebeveted.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81256704061.pdf
    • https://cdn.shopify.com/s/files/1/0430/5682/4471/files/juziwewitunuwafubepawerim.pdf
    • https://cdn.shopify.com/s/files/1/0437/3600/6817/files/latidadapovij.pdf
    • https://cdn.shopify.com/s/files/1/0429/9633/4753/files/nds4ios_rom_downloads.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/9445081716.pdf
    • https://cdn.shopify.com/s/files/1/0437/2273/5767/files/47204186159.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96672573922.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wajumibuxup.pdf
    • https://cdn.shopify.com/s/files/1/0432/7076/6750/files/waxovokaruvuwavu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2036/1629/files/zikewadozipuniv.pdf
    • https://cdn.shopify.com/s/files/1/0427/8606/2495/files/68312730569.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061c3.bin
5572f3b03b6a1b49ff91be2956d0195d4c4afc883cdfd1000f376a9438320b4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61C3 4972 bytes
font_01_sfnt_off000072c1.bin
4d98fc3e60f338fc44e05398d63300d664efb2a5b1829797a25a3aaca012cbe3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72C1 10020 bytes
font_02_sfnt_off0000950d.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x950D 4324 bytes

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