Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cfd25ccd0f8d076…

MALICIOUS

PDF

42.3 KB Created: 2020-08-08 20:52:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 048d77384d5c7744101e32a37466de0a SHA-1: 977576f2b57e9ce35ae163f9a94a7447b01b473b SHA-256: 7cfd25ccd0f8d07695eb83bd0503128d66e133d7a018adb07207e9d982b688f3
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm designed to redirect users. One prominent URL, 'https://ttraff.cc/pify?keyword=etica+y+coaching+ontologico+pdf', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this document is part of a phishing or redirection scheme.

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=etica+y+coaching+ontologico+pdf
    • http://libapiw.worldwidedobermans.com/uploads/1/3/0/8/130814229/2128fc9.pdf
    • http://files.cannabiscareernetwork.com/uploads/1/3/0/8/130874067/9534105.pdf
    • http://files.cantornote.com/uploads/1/3/1/6/131636654/d2143daac97a.pdf
    • http://files.mindhealthconnection.org/uploads/1/3/2/8/132814898/serirukifudesulimax.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/wowenobenugubaxad.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/potiwabuvufepatene.pdf
    • https://cdn.shopify.com/s/files/1/0428/6165/8279/files/49118738333.pdf
    • https://cdn.shopify.com/s/files/1/0430/2890/6138/files/53235011546.pdf
    • https://cdn.shopify.com/s/files/1/0431/5358/8390/files/68301271880.pdf
    • https://cdn.shopify.com/s/files/1/0434/8579/0358/files/lire_journal_el_khabar.pdf
    • https://cdn.shopify.com/s/files/1/0454/8021/4678/files/autocad_underlay_invalid_reference.pdf
    • https://cdn.shopify.com/s/files/1/0432/6051/0376/files/report_on_road_accident.pdf
    • https://cdn.shopify.com/s/files/1/0430/8166/2628/files/76057137103.pdf
    • https://cdn.shopify.com/s/files/1/0440/3278/6597/files/91284044914.pdf
    • https://cdn.shopify.com/s/files/1/0440/6575/1192/files/43078038780.pdf
    • https://cdn.shopify.com/s/files/1/0434/7926/9541/files/nadogubumojufosaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/degipux.pdf
    • https://cdn.shopify.com/s/files/1/0433/0071/6694/files/petebotamefaperepez.pdf
    • https://cdn.shopify.com/s/files/1/0431/6279/6186/files/reading_comprehension_book_download.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_off000068fc.bin
33b57b7f77e51683dad304b420b8cdbb36e051b337dd10580eadeb7552d20ee7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68FC 5200 bytes
font_01_sfnt_off00007ac3.bin
02a7302006c9f1ec0f2bf00ee68c32cb6b242729c584c2b22c8a78a13c3d80e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC3 9684 bytes

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