Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d1f480abc892eae…

MALICIOUS

PDF

50.3 KB Created: 2020-09-07 12:04:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de137a65ff0666122a5502691d8226df SHA-1: e32e66f260726b5b8df6d20e4ce110b83bf4201b SHA-256: 6d1f480abc892eae79d252a7e6b39875baddc336c11a354bc9246d4097e24650
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a known malicious redirector, indicating a phishing or malware distribution attempt. The document body, though obfuscated, contains text suggesting it is a 'Company core data sheet pdf', which is likely a lure. The presence of numerous embedded links to external PDFs, many hosted on Shopify, further supports the link farm heuristic.

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.club/wix?keyword=company+core+data+sheet+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/nisoronuv.pdf
    • https://cdn.shopify.com/s/files/1/0432/6516/3422/files/10575166644.pdf
    • https://cdn.shopify.com/s/files/1/0434/5161/3336/files/zamuwuzez.pdf
    • https://cdn.shopify.com/s/files/1/0428/2328/6940/files/pewoxog.pdf
    • https://static.usrfiles.com/ugd/485053_9933fc4927d0405ba9e9b0dcc74e2039.pdf
    • https://static.usrfiles.com/ugd/b16523_0f0bfe95e1c84b5e9e103ce454f6f5c6.pdf
    • https://static.usrfiles.com/ugd/cb4a18_f6c3de6728164b06ba89866b4a59b3a3.pdf
    • https://static.usrfiles.com/ugd/6203b9_68df856a0f584a2e8b0aff6949077dfa.pdf
    • https://cdn.shopify.com/s/files/1/0431/0709/0581/files/85850121193.pdf
    • https://cdn.shopify.com/s/files/1/0429/8106/4853/files/xibegij.pdf
    • https://cdn.shopify.com/s/files/1/0435/9389/2008/files/mojap.pdf
    • https://cdn.shopify.com/s/files/1/0440/2606/9157/files/45197545908.pdf
    • https://cdn.shopify.com/s/files/1/0432/1227/5870/files/penesonosof.pdf
    • https://static.usrfiles.com/ugd/b8c837_43940db074194fada2b71d292d73fb8a.pdf
    • https://static.usrfiles.com/ugd/0d2908_c8f69dc8aab24634a4a68bfc7aea9545.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_off0000616e.bin
25c4825370450ea3c580197027fffd9f54c44c343553a8735a7f1514075c4d66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x616E 11532 bytes
font_01_sfnt_off00008718.bin
13a19f8713d1faca24c72ac727ef1c81824e23ae6b25dfb8954c1ce530f7876c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8718 5368 bytes
font_02_sfnt_off00009933.bin
a29bee5640947108e4b79597c34354009fd751ebc2c75fa7857437a344f5b5b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9933 10264 bytes

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