Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e4da294c20fdb7d…

MALICIOUS

PDF

44.0 KB Created: 2020-08-27 16:47:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6944d29269954a8302fd1dd35feacd4 SHA-1: abdcb0fa5eb81d9d8cae8947a3f71195cc6c0fe4 SHA-256: 3e4da294c20fdb7daec00ed54cbf64c11b8b96b9fbface50ebde719c9442c6fe
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to a known malicious redirector. The document body, though partially corrupted, includes the URL 'https://ttraff.me/pify?keyword=how+to+do+russian+accent', suggesting a lure to a malicious site. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious content. No scripts were extracted, but the primary attack vector appears to be social engineering via embedded links.

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.me/pify?keyword=how+to+do+russian+accent
    • http://boneso.stfrancesbasketball.com/uploads/1/3/1/4/131453741/f71994dc8.pdf
    • http://gomom.customgroundsmanagement.com/uploads/1/3/2/7/132712354/1398962.pdf
    • http://files.whsak.com/uploads/1/3/0/7/130738637/tefax_fazogatatar_kukizu_varakanile.pdf
    • http://files.eyebelieveeyecan.com/uploads/1/3/0/8/130815014/93cde3f35.pdf
    • http://files.lifewithhd.com/uploads/1/3/0/7/130739962/mozotelanifegepiwu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8996/0865/files/22549367237.pdf
    • https://cdn.shopify.com/s/files/1/0463/1314/4482/files/losemo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7366/6213/files/jonozipotajigoweduwubom.pdf
    • https://cdn.shopify.com/s/files/1/0430/5843/0106/files/55867560078.pdf
    • https://cdn.shopify.com/s/files/1/0432/4560/0936/files/debabipupu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0910/6335/files/68034455986.pdf
    • https://cdn.shopify.com/s/files/1/0462/7870/5312/files/woraziwaxotenisuz.pdf
    • https://cdn.shopify.com/s/files/1/0439/3231/9912/files/ladowuwunon.pdf
    • https://cdn.shopify.com/s/files/1/0437/6703/8106/files/pebabako.pdf
    • https://cdn.shopify.com/s/files/1/0432/3573/7764/files/xexubevulijizetedadebe.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8839/files/veputax.pdf
    • https://cdn.shopify.com/s/files/1/0434/2045/0972/files/jekimivobinifubejufa.pdf
    • https://cdn.shopify.com/s/files/1/0429/1241/5911/files/atkins_quimica_inorganica_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0438/6340/8795/files/difference_between_merger_and_acquisition_and_joint_venture.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000643a.bin
fdf2c3c41a6a49ff66fd9cf8c0cb815138ad8411efe37d17540eaf547dc19190		 pdf-font-stream PDF embedded font (sfnt) at offset 0x643A 4956 bytes
font_01_sfnt_off0000752f.bin
b8912d38dbc2a87b5e532ded4280965313286367d00bf6e72331ce570672a9a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x752F 14284 bytes

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