Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b4f7064c2ae959b…

MALICIOUS

PDF

47.6 KB Created: 2020-08-26 15:33:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58060a4e3c1afa1e34325b22808c2e40 SHA-1: 45559f0b9cf3212aeda0f7f128de51943ac12ece SHA-256: 0b4f7064c2ae959b2c44de5b51b602ff5169c86c8407c8a18c7ff8570d6a0414
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is embedded within the document body, disguised as a search result for 'Bashan quad 200cc top speed'. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to Shopify domains hosting other PDFs. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

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=bashan+quad+200cc+top+speed
    • http://files.phantom-photo-fixers.com/uploads/1/3/0/8/130874050/6766371.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/2535/7210/files/brother_mfc_9330cdw_drivers.pdf
    • https://cdn.shopify.com/s/files/1/0447/2075/0745/files/guilty_crown_episode.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/xilurogisubuterapo.pdf
    • https://cdn.shopify.com/s/files/1/0454/7330/0632/files/amazing_facts_about_animals.pdf
    • https://cdn.shopify.com/s/files/1/0435/3445/0840/files/31809171611.pdf
    • https://cdn.shopify.com/s/files/1/0440/8557/5845/files/buvedidew.pdf
    • https://cdn.shopify.com/s/files/1/0439/4595/1400/files/clash_of_clans_unlimited_gems_apk_ios.pdf
    • https://cdn.shopify.com/s/files/1/0434/2090/9718/files/77067198664.pdf
    • https://cdn.shopify.com/s/files/1/0434/1740/3557/files/sowapetanefefep.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_off00006e9d.bin
2f32f173788d3f512cb5fe27671d31cd005179dffa7061470f33bce4a15bbfb0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9D 5480 bytes
font_01_sfnt_off00008129.bin
073c66451ebb511d45377667594dea3b7cf2f591203724715ded11096db6f2a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x8129 2732 bytes
font_02_sfnt_off00008ccf.bin
8d2e607b8a194f0c1ed1235b738c4e8406f060fcb8e388c27c8510aba85c0911
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CCF 10864 bytes