Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2f1429a1e015bd4…

MALICIOUS

PDF

41.2 KB Created: 2020-07-31 04:28:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73d8596f099b20ff726b3f870e579734 SHA-1: a0966dafa217257d62eb3a12027d2bea69332ccd SHA-256: c2f1429a1e015bd445643ef62c7e8364c3ff9453de8ff4e60133c7aeac4b2dc4
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains and one critical link to a known malicious redirector at 'ttraff.cc'. The document body, though heavily obfuscated, contains text fragments that suggest a lure for a free PDF download. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages.

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=asme+b31.+3+pdf+free
    • http://files.sid1.org/uploads/1/3/1/4/131454012/dapimove_sapowunena_bigiwaxemu_sezegavoranero.pdf
    • http://files.longsilverconstruction.com/uploads/1/3/1/3/131381799/2627383.pdf
    • http://files.modernhistoryseminars.com/uploads/1/3/1/4/131438397/lepifixe.pdf
    • http://files.modernhistoryseminars.com/uploads/1/3/1/4/131438397/lepifixe.pd
    • https://cdn.shopify.com/s/files/1/0438/6563/7019/files/zesebokunekiremezike.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51106899687.pdf
    • https://cdn.shopify.com/s/files/1/0438/1143/8752/files/99035476965.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5604/files/47149149518.pdf
    • https://cdn.shopify.com/s/files/1/0434/0698/3333/files/5336997545.pdf
    • https://cdn.shopify.com/s/files/1/0434/7471/4784/files/42240578883.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7352/files/vujog.pdf
    • https://cdn.shopify.com/s/files/1/0430/4620/7650/files/kuviwirebotubigixutow.pdf
    • https://cdn.shopify.com/s/files/1/0438/9847/0555/files/rabevasuxelulede.pdf
    • https://cdn.shopify.com/s/files/1/0429/6310/8003/files/pavibazimitu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1648/6040/files/31271316498.pdf
    • https://cdn.shopify.com/s/files/1/0430/7245/4810/files/59110182047.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/33540287451.pdf
    • https://cdn.shopify.com/s/files/1/0430/0655/8359/files/masijajewipudo.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_off00006566.bin
4d87855448c523007aa4be05b14e53ca96ff8f1b1168bc84199d3f2f8c33a93e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6566 4768 bytes
font_01_sfnt_off00007584.bin
56788f055784ab26fc3650c9f7693c0e8a38ca2b2a07f45d289e1385e51cb426		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7584 10068 bytes

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