Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dfd952cd215f922…

MALICIOUS

PDF

47.6 KB Created: 2020-08-02 02:41:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3db9f259a0a8582932b8b07acac42187 SHA-1: 28b0b5ca0ee63e82c776ae0dd373ec5f339be546 SHA-256: 0dfd952cd215f9227136d97797160c1f099659640d92b12bac7ae8c732f113f2
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 resources, suggesting a link farm or redirection strategy. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=scac+code+list'. The document body, though partially corrupted, contains the same URL and a reference to 'scac code list', indicating a potential lure for users seeking information, which then redirects them to malicious 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.ru/pify?keyword=scac+code+list
    • http://files.suffolksingers.co.uk/uploads/1/3/1/6/131606984/212881d88fbe6.pdf
    • http://files.mansfielddems.org/uploads/1/3/1/3/131379280/3607220.pdf
    • http://files.coolnativesnursery.com/uploads/1/3/0/8/130874240/nibenabomosekejel.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/5361/2199/files/towetovameruzedavifuke.pdf
    • https://cdn.shopify.com/s/files/1/0432/6332/8418/files/2786476661.pdf
    • https://cdn.shopify.com/s/files/1/0431/7714/8571/files/kuvaxiwalulivu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1830/5179/files/bigomavenuni.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9477/files/98485470871.pdf
    • https://cdn.shopify.com/s/files/1/0431/1026/9085/files/gukarewosad.pdf
    • https://cdn.shopify.com/s/files/1/0435/6499/0632/files/circle_of_the_shepherd_5e.pdf
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/70329487409.pdf
    • https://cdn.shopify.com/s/files/1/0432/7679/6057/files/lipakubilatewebejaboxizi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4493/6599/files/69714557576.pdf
    • https://cdn.shopify.com/s/files/1/0428/2623/6063/files/dububivokezubibez.pdf
    • https://cdn.shopify.com/s/files/1/0431/8812/5857/files/1945512618.pdf
    • https://cdn.shopify.com/s/files/1/0429/7896/7703/files/lugukino.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000634b.bin
1d485671d5c558bc566ac17df819cc684a052ccfe8e65925d9baef114f414874		 pdf-font-stream PDF embedded font (sfnt) at offset 0x634B 4624 bytes
font_01_sfnt_off000072f3.bin
7ce736f724db5c5278310b9aecf74c44550d1c89cd57c873fe917edfe38b9730		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72F3 15292 bytes
font_02_sfnt_off0000a228.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA228 4324 bytes

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