Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c1d9f7184a58665…

MALICIOUS

PDF

40.1 KB Created: 2020-08-15 02:27:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e139f61a89cea353442fd8e8ab9a50a SHA-1: 14d3b70c9fb4e4a0cbeb310c65da20bbd80a05b8 SHA-256: 5c1d9f7184a586653b7aa14035cb1d830cc32f1df61e2a4c59a5d342e4963f3a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, also contains this URL and appears to be a lure related to 'angry whatsapp status video free'. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm intended to distribute malicious content or traffic.

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.ru/pify?keyword=angry+whatsapp+status+video+free
    • http://nezapivo.shopofficeglam.com/uploads/1/3/1/4/131406436/xebobov.pdf
    • http://files.usaexpressions.com/uploads/1/3/2/6/132695636/sanodovekebaxa.pdf
    • http://mexag.islandcounselinggroup.com/uploads/1/3/0/8/130814769/renagisol.pdf
    • http://rosemeta.cassondramoriarty.com/uploads/1/3/1/3/131383483/xagesozumako_dunezevemapuz_badojenuxula_wozosojibefam.pdf
    • http://files.isoandbusinessexpert.com/uploads/1/3/0/8/130813797/noxodak.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/5102/2501/files/negapus.pdf
    • https://cdn.shopify.com/s/files/1/0435/5158/8507/files/dilekotufoxuxewu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4406/0839/files/nalexok.pdf
    • https://cdn.shopify.com/s/files/1/0435/3956/2651/files/nubarumagu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9243/5359/files/wing_chun_training_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/1758/4285/files/wipusa.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2661/files/zuviwexenomelugokariv.pdf
    • https://cdn.shopify.com/s/files/1/0431/0692/6741/files/38938960253.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/67819979065.pdf
    • https://cdn.shopify.com/s/files/1/0431/1806/7876/files/murijizifasara.pdf
    • https://cdn.shopify.com/s/files/1/0432/1912/4382/files/79131010293.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d7c.bin
57dd52ded1e05bbc46be59ae708427484013f25122b91d70497b991485816add		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D7C 5512 bytes
font_01_sfnt_off00007049.bin
f3654e5a94382e25b8dd3cbf9e500b5083443072775f99acb0d7b088e8692fe3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7049 10148 bytes

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