Malicious PDF — malware analysis report

Static analysis result for SHA-256 56ed1333dc3695a0…

MALICIOUS

PDF

45.7 KB Created: 2020-08-18 21:54:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51e5f32ee98b77533a97046377244d3a SHA-1: e7f31ef08a35a1234908e7d8e2b949ea5c95a0b8 SHA-256: 56ed1333dc3695a0fa1866ba6438ad5494f0f4be3f5b4a38fbe8b66e0de99e4b
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=general+knowledge+test+papers+with+answers'. This URL is presented within the document body, disguised as a link to test papers with answers. The document also contains a large number of external PDF links, many hosted on Shopify, which is flagged as a link farm. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing attempts.

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.cc/pify?keyword=general+knowledge+test+papers+with+answers
    • http://latepanog.fdfdoodles.com/uploads/1/3/2/3/132303195/milebosava_golajemu_xutogitikutede_werenulex.pdf
    • http://files.teachingkidstothrive.com/uploads/1/3/1/8/131856715/8596130.pdf
    • https://cdn.shopify.com/s/files/1/0433/4895/1194/files/segokirufexevudofaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/tufenidaburili.pdf
    • https://cdn.shopify.com/s/files/1/0431/0938/4345/files/zofujasunimiwafu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0654/9406/files/15228479865.pdf
    • https://cdn.shopify.com/s/files/1/0430/6803/1143/files/vunapin.pdf
    • https://cdn.shopify.com/s/files/1/0435/2950/2874/files/jomibofiwebagajasineperon.pdf
    • https://cdn.shopify.com/s/files/1/0431/1931/3062/files/99961969604.pdf
    • https://cdn.shopify.com/s/files/1/0430/6848/9881/files/kiran_bank_maths_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/6538/4866/files/69841984094.pdf
    • https://cdn.shopify.com/s/files/1/0430/5669/3397/files/2496780669.pdf
    • https://cdn.shopify.com/s/files/1/0435/3101/0199/files/11664484356.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_off00006dec.bin
8a0d1948cb8339c6921503128318092556f18bade07f5cb5a337b8cf354f0296		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DEC 5408 bytes
font_01_sfnt_off00008068.bin
ce3fdde8dbbd5009082e1bd5dce6ee27b139283bc740a15cf5a11d562e67b6a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8068 13068 bytes

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