Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c7bbdc75ea634f8…

MALICIOUS

PDF

49.5 KB Created: 2020-07-31 06:09:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5a077c401cf2ba9d9c4320663356d0c SHA-1: 9dd35820483fa1669d15bb4143654cf75c897e20 SHA-256: 0c7bbdc75ea634f8ca8eceae04c42af0811c8a7377e849522a2801ffc08a5d2a
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector pointing to 'ttraff.com'. The document body, though heavily obfuscated, suggests a lure related to a 'McDonald's menu'. The presence of a link farm heuristic further indicates an attempt to distribute malicious content or phish users. No scripts were extracted, but the primary attack vector appears to be the malicious links.

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.com/pify?keyword=mcdonald+s+menu+pdf+usa
    • http://files.matteframe.com/uploads/1/3/1/4/131482821/nimuxowebirapop-jubunufaselapij.pdf
    • http://files.riddlefamilyranchgrassfedbeef.com/uploads/1/3/1/8/131871980/sofatutefamikev.pdf
    • http://files.scdentallab.com/uploads/1/3/0/8/130813757/wumiganer.pdf
    • http://files.hurstjhband.org/uploads/1/3/1/4/131454024/jixanidovezeribijon.pdf
    • http://files.sunshineofsa.com/uploads/1/3/0/7/130739503/5228847.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/6356/5727/files/4674654924.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9079/files/26140427531.pdf
    • https://cdn.shopify.com/s/files/1/0431/1931/3062/files/77322400733.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4023/files/94416620728.pdf
    • https://cdn.shopify.com/s/files/1/0432/6254/1982/files/16535030357.pdf
    • https://cdn.shopify.com/s/files/1/0432/4098/0643/files/18974443879.pdf
    • https://cdn.shopify.com/s/files/1/0429/8850/3203/files/83526450488.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/23609072810.pdf
    • https://cdn.shopify.com/s/files/1/0437/7280/5277/files/fetinatojamepozisej.pdf
    • https://cdn.shopify.com/s/files/1/0432/8338/2427/files/47839730764.pdf
    • https://cdn.shopify.com/s/files/1/0434/8110/4541/files/86205044857.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zetelonum.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_off000084a4.bin
b9b6268ac457ef42a5dd7628121890f409516e6cb23f2f7f7ebb94ec6d599ac9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84A4 4964 bytes
font_01_sfnt_off0000956a.bin
75cf1ed2a6da69e6ca507966610cbebe1e6f9bcff766bd48af422e50a415fa46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x956A 10260 bytes

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