Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6beaf9d0f731398…

MALICIOUS

PDF

71.7 KB Created: 2020-08-22 16:31:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf297f28451e73581b5ea4cb2673fac3 SHA-1: 616b3df897edb73b03dec797f997ed99d62574e8 SHA-256: b6beaf9d0f731398fe7e5e09e4087b4ef23ff4ffab5edb001fadf5d23c916232
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as 'Anticoagulation guidelines 2019'. This link, https://ttraff.com/pify?keyword=anticoagulation+guidelines+2019, points to known malicious infrastructure. The document also contains a large number of embedded links, many pointing to Shopify, suggesting a link farm or SEO poisoning attempt to distribute malicious content. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=anticoagulation+guidelines+2019
    • http://pazum.trangallan.com/uploads/1/3/1/6/131606339/ffdb97a63608.pdf
    • http://titesexap.janeyplay.com/uploads/1/3/1/4/131438667/pefajemisokurutos.pdf
    • https://cdn.shopify.com/s/files/1/0430/6246/0577/files/8343292834.pdf
    • https://cdn.shopify.com/s/files/1/0437/6359/7466/files/turumabetiduriru.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5322/files/koxogogilevamogero.pdf
    • https://cdn.shopify.com/s/files/1/0428/5336/7975/files/84927353859.pdf
    • https://cdn.shopify.com/s/files/1/0431/5394/8836/files/34809156193.pdf
    • https://cdn.shopify.com/s/files/1/0428/6060/9692/files/dark_valefor_ffx.pdf
    • https://cdn.shopify.com/s/files/1/0440/9799/4904/files/poxotijebolasi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6473/7433/files/76543790029.pdf
    • https://cdn.shopify.com/s/files/1/0432/9170/5502/files/41942969644.pdf
    • https://cdn.shopify.com/s/files/1/0428/2915/2423/files/faruwazopudotemabotigos.pdf
    • https://cdn.shopify.com/s/files/1/0440/9645/4808/files/amadeus_movie_notes_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/3804/0487/files/43228576893.pdf
    • https://cdn.shopify.com/s/files/1/0434/0652/4566/files/how_to_change_ip_address_on_mac.pdf
    • https://cdn.shopify.com/s/files/1/0441/1500/1496/files/root_cause_failure_analysis.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_off0000d8c9.bin
7c0e79ad9a9abb5490578bbde104d06a61143c1de058c29543aa9833bb87fc00		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C9 5484 bytes
font_01_sfnt_off0000eb7c.bin
81719141487a3568096c7df184a208bcd6b391ad2ea553301570c240a25e76f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7C 11252 bytes

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