Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e2dcbd05a82a0fe…

MALICIOUS

PDF

45.3 KB Created: 2020-08-09 08:56:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6664cd57a02c47ac005956053a7bc07b SHA-1: 0e2b08a91fe36f84f6becf93882947848679e33d SHA-256: 0e2dcbd05a82a0fe7c4d847063de094ec12dbaa1298ee1b3cf42dcdf1ae1d58e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to external PDF files, indicating a link farm or SEO spam tactic. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=kautilya+arthashastra+summary+pdf'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of numerous URLs and the malicious redirector suggest an attempt to drive traffic to potentially harmful sites.

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.cc/pify?keyword=kautilya+arthashastra+summary+pdf
    • http://dezitot.morningnoodle.com/uploads/1/3/0/7/130775320/6016794.pdf
    • http://rudek.frankclinic.org/uploads/1/3/1/1/131164250/kuluxunosobuzep.pdf
    • http://files.mccoysactionkarate.com/uploads/1/3/1/6/131637919/tameb.pdf
    • http://files.ipuwaifarm.co.nz/uploads/1/3/1/4/131438784/2160943.pdf
    • http://dujen.djdesignsbrooklyn.com/uploads/1/3/0/7/130739415/9108364.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lomapatigusobotatijizu.pdf
    • https://cdn.shopify.com/s/files/1/0438/2654/4802/files/banirajumizuxutixuwiboki.pdf
    • https://cdn.shopify.com/s/files/1/0437/1437/9930/files/cbse_sample_paper_2020_class_10.pdf
    • https://cdn.shopify.com/s/files/1/0436/9920/8346/files/parts_of_the_catholic_mass_explained.pdf
    • https://cdn.shopify.com/s/files/1/0430/0272/4506/files/19912151943.pdf
    • https://cdn.shopify.com/s/files/1/0429/5219/6249/files/nalosemomuduwetupif.pdf
    • https://cdn.shopify.com/s/files/1/0429/6297/6921/files/sejavevipakori.pdf
    • https://cdn.shopify.com/s/files/1/0431/1659/3312/files/zibisemekipi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6821/9799/files/shaving_cream_song.pdf
    • https://cdn.shopify.com/s/files/1/0451/1947/1781/files/social_marketing_articles.pdf
    • https://cdn.shopify.com/s/files/1/0430/1147/3571/files/rufiremowibodafot.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_off00007373.bin
18e44bd6f4e406bdde86d7cb5853ac0a4506ba64c615b9baf2ce07f2258c77d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7373 5352 bytes
font_01_sfnt_off00008586.bin
ef6017a7cfb60d0618ade37d0ef6311e0b55ca6b5a0ed2cb347cc531c3ad2b51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8586 10256 bytes

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