Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a356bd58a27171f…

MALICIOUS

PDF

37.1 KB Created: 2020-07-30 14:12:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5f15bafc6dfb3c7a791b9df551939d3 SHA-1: 28e4050dfc010d9f53d98165f9a5c4980e9a13c4 SHA-256: 2a356bd58a27171fa3db5d2868e7bfea1e306fa8457c36f1b9b0e1da3fb41fd8
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'ttraff.com', which is flagged as malicious. The document body, though heavily obfuscated, appears to be a lure for a PDF download. The presence of numerous external links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to attract victims. No scripts were extracted from this sample.

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=breakfast+at+tiffany+s+pdf+download
    • http://files.stopittop.com/uploads/1/3/2/7/132740267/4994635.pdf
    • http://files.silvermistmorgans.com/uploads/1/3/1/1/131163687/lemavipidodame.pdf
    • http://files.wolfpups.org/uploads/1/3/0/7/130739793/farifutiref.pdf
    • https://cdn.shopify.com/s/files/1/0429/3066/7673/files/vesuru.pdf
    • https://cdn.shopify.com/s/files/1/0434/9480/1568/files/rutanoxijojelupepaves.pdf
    • https://cdn.shopify.com/s/files/1/0430/8228/5216/files/18301408129.pdf
    • https://cdn.shopify.com/s/files/1/0427/5997/9174/files/vonedabirixakatugajoge.pdf
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/jafotubigetadita.pdf
    • https://cdn.shopify.com/s/files/1/0429/1428/3686/files/53342998502.pdf
    • https://cdn.shopify.com/s/files/1/0434/3929/2577/files/81417935738.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6152/files/20010964937.pdf
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/74427404579.pdf
    • https://cdn.shopify.com/s/files/1/0431/9058/3458/files/josurexitajidu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9141/7505/files/wogogixenetaku.pdf
    • https://cdn.shopify.com/s/files/1/0431/2658/7549/files/kolasunipezanutapezuta.pdf
    • https://cdn.shopify.com/s/files/1/0434/0334/6078/files/fawopalejunevekik.pdf
    • https://cdn.shopify.com/s/files/1/0429/0838/5439/files/81350017075.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/
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/fi

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005688.bin
80f996b8a29579f147cc396594a7043de984c671556b439a81109aafa8b2ff6a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5688 5132 bytes
font_01_sfnt_off0000681f.bin
216a0a7e5fa1c1245edebdf1e141a536d418e4006be83403e842dc92f97f7e9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x681F 9152 bytes