Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b9f09a254c24185…

MALICIOUS

PDF

47.2 KB Created: 2020-08-24 16:12:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4ed934d4aebb16ac4c90d6a8568b22a SHA-1: 70b5a40a0bf8d8d4b04c39bed78df7e04719d477 SHA-256: 0b9f09a254c24185d4ea566891abd21fe76c50f34b2204f86a0588dfae237354
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a harmful site. The document body, though partially garbled, includes the target URL and references to a large number of other PDF files hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious.

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=r+a+f+ki+full+form
    • http://niros.psignologic.net/uploads/1/3/0/7/130775823/6927305.pdf
    • http://files.riversedgetownhome.com/uploads/1/3/1/0/131070920/0cf11df56521.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0430/7196/3296/files/7819646984.pdf
    • https://cdn.shopify.com/s/files/1/0431/0971/2033/files/xaxilomewekid.pdf
    • https://cdn.shopify.com/s/files/1/0428/7217/6799/files/masoropofol.pdf
    • https://cdn.shopify.com/s/files/1/0431/8196/5474/files/mevimiwerapimob.pdf
    • https://cdn.shopify.com/s/files/1/0434/2887/2359/files/tanoserodor.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9525/files/52960259052.pdf
    • https://cdn.shopify.com/s/files/1/0433/3495/9256/files/tifan.pdf
    • https://cdn.shopify.com/s/files/1/0439/1282/2939/files/facebook_ads_picture_format.pdf
    • https://cdn.shopify.com/s/files/1/0430/8130/2167/files/gawedanorusesuwakimexewig.pdf
    • https://cdn.shopify.com/s/files/1/0438/5947/6630/files/vimivejaguzudukuxiko.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bab.bin
47905789e8ed05b503f36421c7395b17d1c469bbbf7298d1256789ba3c47a862		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BAB 4808 bytes
font_01_sfnt_off00006bee.bin
d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BEE 3720 bytes
font_02_sfnt_off00007752.bin
d5798968aaa35bab004c6389b36ed9f60accb0e3c7d79d0154ff8ddffc8a9bcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7752 10268 bytes
font_03_sfnt_off00009abb.bin
f859d87f6734b5d83f92832203b05e5c35bd0da1c5cc118528da21c8fd0ef17e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9ABB 5996 bytes

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