Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f1bdc0693a7140b…

MALICIOUS

PDF

50.0 KB Created: 2020-08-03 11:00:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46241faab317be4e294fb2f67d0f42b0 SHA-1: d018d2cf1e7e7545a7f04d19ec0d836a518aa574 SHA-256: 0f1bdc0693a7140bffca7228ad1d27bd6b8b61bda0635e9008f8bb8109f4808a
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though heavily obfuscated, contains the same URL, indicating the primary intent is to drive traffic to this malicious redirector. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence suggest a phishing or scam campaign.

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=minecraft+medieval+roleplay+server
    • http://files.moldova-ministry.org/uploads/1/3/1/6/131606202/cfe64fa9f44b4bf.pdf
    • http://files.lasalservices.com/uploads/1/3/1/4/131406430/96f88a6f.pdf
    • http://files.myvirtualdietitian.com/uploads/1/3/1/0/131071035/pavevagalumoga.pdf
    • http://files.kendixonartblog.com/uploads/1/3/0/7/130740077/geduriwinozufulila.pdf
    • http://files.sharpeningonsite.com/uploads/1/3/2/7/132740997/lopuzagisekol.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/74753486714.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/boguxexu.pdf
    • https://cdn.shopify.com/s/files/1/0434/9113/1554/files/77535492937.pdf
    • https://cdn.shopify.com/s/files/1/0429/7228/3033/files/jupamosavo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2665/3079/files/lanapasijorufax.pdf
    • https://cdn.shopify.com/s/files/1/0431/0335/5034/files/87686273694.pdf
    • https://cdn.shopify.com/s/files/1/0433/3705/6414/files/sutavakixedite.pdf
    • https://cdn.shopify.com/s/files/1/0438/9617/6795/files/jejadik.pdf
    • https://cdn.shopify.com/s/files/1/0438/2762/6134/files/25912827985.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5236/files/xagakika.pdf
    • https://cdn.shopify.com/s/files/1/0431/1806/7876/files/murijizifasara.pdf
    • https://cdn.shopify.com/s/files/1/0438/1927/0306/files/69723722343.pdf
    • https://cdn.shopify.com/s/files/1/0430/7651/8049/files/71281458900.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_off0000840d.bin
292e21b9b6f4b9e7b90e6c4d0cb20a91aac4aa023e8cc0f524e23778f1ee9270		 pdf-font-stream PDF embedded font (sfnt) at offset 0x840D 5468 bytes
font_01_sfnt_off000096ac.bin
7db912b5a220cdff81f922c8fab6a5b39b0b8dcbedac73631ad20733072b2b01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96AC 10544 bytes

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