Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c9528eb5bad8bca…

MALICIOUS

PDF

49.1 KB Created: 2020-07-30 13:32:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96749d02c1a932e9950985e114350ada SHA-1: 330df1b70602431d772f15e76f693c5445e0e4e0 SHA-256: 8c9528eb5bad8bca4d960e891e171b11e1117119682df778069eed04d3282d66
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, traff.cc, disguised as a document about diabetes. It also hosts a large number of external PDF links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. The document body is heavily obfuscated and appears to be generated content rather than user-readable text.

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=epidemiology+of+diabetes+mellitus+type+2+pdf
    • http://files.harrysinkpot.co.uk/uploads/1/3/1/4/131452880/jaroxuvekoriwumano.pdf
    • http://files.flawlessskinstudio.com/uploads/1/3/1/1/131164002/4000228.pdf
    • http://files.thepromiselandcamp.com/uploads/1/3/1/8/131857213/pulawuzoruki_tozegugopa_tulasagajexiz.pdf
    • http://files.kktyonline.com/uploads/1/3/0/7/130738769/lajeritus.pdf
    • http://files.thepromiselandcamp.com/uploads/1/3/1/8/1318572
    • https://cdn.shopify.com/s/files/1/0438/9208/0792/files/dorivofutoresomeju.pdf
    • https://cdn.shopify.com/s/files/1/0431/1410/2941/files/zaroxu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/35920788717.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30698029692.pdf
    • https://cdn.shopify.com/s/files/1/0435/8920/6174/files/numejar.pdf
    • https://cdn.shopify.com/s/files/1/0434/7455/0950/files/pawubojuzexapukeduvala.pdf
    • https://cdn.shopify.com/s/files/1/0432/9088/6312/files/linusetore.pdf
    • https://cdn.shopify.com/s/files/1/0430/6337/8081/files/ruxuxizevemibezikiw.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9381/files/jarate.pdf
    • https://cdn.shopify.com/s/files/1/0428/8672/5795/files/89303013220.pdf
    • https://cdn.shopify.com/s/files/1/0429/6241/9863/files/62127315428.pdf
    • https://cdn.shopify.com/s/files/1/0435/8212/8283/files/31061036090.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_off00008008.bin
da43a83df53c550e765760972713271b712d309e161ad26c176a537ed2ba3502		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8008 5372 bytes
font_01_sfnt_off00009268.bin
e12a747409e021efaf3192a5e97b3ddb2b7fd2360ffae3cab4de50453d7c275f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9268 10064 bytes

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