Malicious PDF — malware analysis report

Static analysis result for SHA-256 499c7115655d6c2d…

MALICIOUS

PDF

61.1 KB Created: 2020-08-06 06:43:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1d840d53a4bb4f7983b12b2034b2130 SHA-1: 2066819539f4140e98deb8fbbfd240698f9cbc73 SHA-256: 499c7115655d6c2d9afbdaa8b4e0bc4fe91311c567485e7b08f27ac77bc6dbbd
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. This URL is designed to redirect users to potentially harmful content. The document also exhibits characteristics of a link farm, embedding numerous links, many of which point to Shopify domains, likely for SEO manipulation to increase visibility. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the presence of the malicious redirector is sufficient to classify the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=brothers+grimm+snow+white+pdf
    • http://files.hypnobabiescoloradosprings.com/uploads/1/3/2/6/132681851/7443406.pdf
    • http://files.prideofpa.com/uploads/1/3/1/4/131406337/kolonoma_pogenerebude_tidako_vojulenujegowi.pdf
    • http://files.mrsnow.org/uploads/1/3/1/4/131453902/kafasefejigufe.pdf
    • https://cdn.shopify.com/s/files/1/0432/1977/9742/files/22303253180.pdf
    • https://cdn.shopify.com/s/files/1/0433/7650/9080/files/fonorixova.pdf
    • https://cdn.shopify.com/s/files/1/0437/3279/5541/files/pong_python_code.pdf
    • https://cdn.shopify.com/s/files/1/0433/2689/8344/files/71679150879.pdf
    • https://cdn.shopify.com/s/files/1/0432/6601/5396/files/atmosfera_terrestre.pdf
    • https://cdn.shopify.com/s/files/1/0432/1227/5870/files/80666083405.pdf
    • https://cdn.shopify.com/s/files/1/0430/9647/3749/files/zogogurafekata.pdf
    • https://cdn.shopify.com/s/files/1/0435/4804/9572/files/american_english_file_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/40360089120.pdf
    • https://cdn.shopify.com/s/files/1/0430/9345/9093/files/54793170915.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7416/files/4308052183.pdf
    • https://cdn.shopify.com/s/files/1/0428/3236/3676/files/73813260005.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3106/files/nipuduloxewosilelogewaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/9888/9621/files/suragegafewugo.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_off0000b263.bin
6de92c33541c198d17eba1a13a22b4560cc34fdc1a3d174b4232c7a65706b548
pdf-font-stream PDF embedded font (sfnt) at offset 0xB263 5352 bytes
font_01_sfnt_off0000c488.bin
3bbdb71c344025995f1453697e2b0ee15b000574e42dd17d976fea0624ac63f0
pdf-font-stream PDF embedded font (sfnt) at offset 0xC488 10220 bytes