Malicious PDF — malware analysis report

Static analysis result for SHA-256 4524dcf9017a3d85…

MALICIOUS

PDF

56.0 KB Created: 2020-08-08 20:41:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4bfd8067a7633996ad6cc37d306707d3 SHA-1: 31c2d0cb2cbf41e1012d27f4f22d910f6595fc16 SHA-256: 4524dcf9017a3d851bad8b24a8a4f8990c5f6a67be676239f9de0fba31605528
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to a redirector service. The document body text, though partially corrupted, suggests a lure related to academic writing, likely to disguise the malicious intent. The primary malicious URL identified is https://ttraff.com/pify?keyword=como+fazer+um+texto+dissertativo+argumentativo+pdf, which is flagged as a malicious redirector.

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.com/pify?keyword=como+fazer+um+texto+dissertativo+argumentativo+pdf
    • http://files.chicagofreeforall.com/uploads/1/3/1/4/131483955/rivixuw.pdf
    • http://files.suenamibeautypoint.com/uploads/1/3/0/8/130814531/jomebag-pobesoketaw-kenubosatunige-suxidewab.pdf
    • http://dutaki.chattanoogabahai.org/uploads/1/3/1/4/131453870/8438560.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/pivetugidigatam.pdf
    • https://cdn.shopify.com/s/files/1/0432/3016/7202/files/43661312469.pdf
    • https://cdn.shopify.com/s/files/1/0433/3898/9718/files/zejid.pdf
    • https://cdn.shopify.com/s/files/1/0431/1564/3042/files/termination_of_rental_agreement_letter_by_tenant.pdf
    • https://cdn.shopify.com/s/files/1/0434/3876/8294/files/defibifeponasa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejupabofutub.pdf
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/motilabotababagorizo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7952/4759/files/ruluvebodixunuso.pdf
    • https://cdn.shopify.com/s/files/1/0430/6570/4599/files/16950648233.pdf
    • https://cdn.shopify.com/s/files/1/0434/6295/1074/files/xixuvemaniwino.pdf
    • https://cdn.shopify.com/s/files/1/0438/8493/7384/files/environmental_agencies_in_nigeria.pdf
    • https://cdn.shopify.com/s/files/1/0447/8078/1719/files/differential_amplifier_working.pdf
    • https://cdn.shopify.com/s/files/1/0438/8156/2280/files/bogipuzasafikevatoz.pdf
    • https://cdn.shopify.com/s/files/1/0437/8551/9255/files/conducting_research_literature_reviews_from_the_internet_to_paper.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_off000098c2.bin
bf7a068fd538b92b131147ee8f70de24317ed6714a23b31653ccd63f819c8b78
pdf-font-stream PDF embedded font (sfnt) at offset 0x98C2 5412 bytes
font_01_sfnt_off0000ab2c.bin
ab8d7fffd1d7a19b3b92016b3df39fbd794b3f6d3e8786a68fbda37332a67600
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB2C 12500 bytes