Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7680f164651f86e…

MALICIOUS

PDF

46.1 KB Created: 2020-07-30 14:59:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e6a3983b178fe7bcfa4fb33bca1b6f3 SHA-1: 802ce991f8031b48e6fb8b46ec187a3015c4c077 SHA-256: c7680f164651f86ea325cb83090c44c308f64bd94db774616ce620544d00927b
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to a 'chemistry book for class 11', suggesting a lure. The primary malicious URL identified is ttraff.ru, which is flagged as a redirector. The presence of a large number of SEO-optimized PDF links on Shopify domains indicates a link farm used to distribute malicious content.

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.ru/pify?keyword=chemistry+book+for+class+11+sindh+textbook+board+pdf
    • http://files.cumberlandhabitat.org/uploads/1/3/1/0/131070356/ruvupekuzinixotoji.pdf
    • http://files.castlewoodclays.com/uploads/1/3/0/8/130873907/b18a71fa7bc6.pdf
    • http://files.almosthomecaninerescue.com/uploads/1/3/1/4/131453267/63448b4ff.pdf
    • https://cdn.shopify.com/s/files/1/0437/8358/5953/files/59857307434.pdf
    • https://cdn.shopify.com/s/files/1/0431/6010/9210/files/jufofevunez.pdf
    • https://cdn.shopify.com/s/files/1/0431/4071/0566/files/wenuto.pdf
    • https://cdn.shopify.com/s/files/1/0428/4855/1068/files/44725475366.pdf
    • https://cdn.shopify.com/s/files/1/0434/4958/1730/files/34113908793.pdf
    • https://cdn.shopify.com/s/files/1/0430/6999/7207/files/zawagasolupe.pdf
    • https://cdn.shopify.com/s/files/1/0429/3555/0111/files/mobekibolu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8113/7316/files/fujorifamokizosonurukoti.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dejotoxirebogoro.pdf
    • https://cdn.shopify.com/s/files/1/0432/9714/4990/files/sejasotapuguzomomopume.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/kofujesudobinefu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2487/5674/files/mipusilisefubotomosu.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/
    • https://cdn.shopify.com/s/files/1/0428

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b10.bin
a5b4c2d414e1556d991b239b0545421c9f81250dfb4b315dcc26bca181cb1893
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B10 5632 bytes
font_01_sfnt_off00006e16.bin
02a030a1ad18da9d6faee914d7890a2170b33560399256e3d892ed6c920d2f71
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E16 9728 bytes
font_02_sfnt_off00008f9a.bin
0f48a34beea1fc4e85d70c2ff7abeb2bdcbc99ad0512cc423888b130d5dd2cc6
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F9A 17844 bytes