Malicious PDF — malware analysis report

Static analysis result for SHA-256 20d858d20c8733bd…

MALICIOUS

PDF

49.2 KB Created: 2020-07-31 09:55:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5b1cecbaa374434cb18746da31d177d SHA-1: f7ac4e870ab00e991577e373a382ae647904ccee SHA-256: 20d858d20c8733bda59992b0c1346c216279d148d4d972a1d2c0826adfddf277
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. This URL is likely used to redirect users to a malicious site for phishing or malware delivery. The document body, though heavily obfuscated, contains text related to 'supply chain management pdf project', suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy to improve search engine visibility for malicious content.

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=supply+chain+management+pdf+project
    • http://files.vincentsgermanshepherds.com/uploads/1/3/0/8/130815228/2997746.pdf
    • http://files.yaltacraft.com/uploads/1/3/1/0/131070911/8225186.pdf
    • http://files.illinoiswarriorselite.com/uploads/1/3/2/3/132303077/maber.pdf
    • https://cdn.shopi
    • https://cdn.shopify.com/s/files/1/0431/9258/2293/files/97240070724.pdf
    • https://cdn.shopify.com/s/files/1/0431/0751/6578/files/lexurigem.pdf
    • https://cdn.shopify.com/s/files/1/0437/7398/4919/files/83841930381.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/30776548905.pdf
    • https://cdn.shopify.com/s/files/1/0433/7342/8888/files/gijike.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jakenetukuzalavat.pdf
    • https://cdn.shopify.com/s/files/1/0429/0379/7916/files/96889239700.pdf
    • https://cdn.shopify.com/s/files/1/0437/1070/9913/files/setisamazimabe.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3212/files/livikenezemuzeten.pdf
    • https://cdn.shopify.com/s/files/1/0432/1119/4525/files/jezuji.pdf
    • https://cdn.shopify.com/s/files/1/0432/4058/7431/files/45154453730.pdf
    • https://cdn.shopify.com/s/files/1/0438/9021/3019/files/tosabalo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9649/0655/files/zedubisavofinotisifoxeb.pdf
    • https://cdn.shopify.com/s/files/1/0432/3606/5438/files/10105050553.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008088.bin
8605f9d5daabfa75eb277ec41fbc04ad7c74bc34f2806acaca7f57780e22e420		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8088 5552 bytes
font_01_sfnt_off00009340.bin
c4266a4e358f62e3ff21bdc4f3293289ad641c9677f9468b1ebd9ead3c8f6ad4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9340 10608 bytes

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