Malicious PDF — malware analysis report

Static analysis result for SHA-256 98c173f50d00ac9b…

MALICIOUS

PDF

39.9 KB Created: 2020-08-04 23:31:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b87277eba4d4624ca1966e076cb485d SHA-1: f4a2d3e4a445978882865b747c82fd3781972074 SHA-256: 98c173f50d00ac9b1d269fbeb2f4ecd30f13cc345b5f19a546f82223263c286c
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. The primary heuristic identifies a link to a known malicious redirector, 'ttraff.ru', disguised with a keyword related to guitar scales. While many linked Shopify URLs are benign, the presence of the malicious redirector and the sheer volume of links suggest a link farm designed to distribute traffic to potentially harmful destinations.

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.ru/pify?keyword=guitar+scales+arpeggios+pdf
    • http://bogimol.thecyberunion.com/uploads/1/3/2/7/132740214/xumaj.pdf
    • http://files.precisioncoatsandgunworks.com/uploads/1/3/2/7/132710779/jepukefo.pdf
    • http://pevul.inspirationplantation.com/uploads/1/3/1/4/131453494/nodiratitizajak_titezedozogili.pdf
    • https://cdn.shopify.com/s/files/1/0433/8886/2622/files/applied_mathematics_1_hr_luthra.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27360052690.pdf
    • https://cdn.shopify.com/s/files/1/0430/5167/9893/files/48536733816.pdf
    • https://cdn.shopify.com/s/files/1/0431/0433/8074/files/978301527.pdf
    • https://cdn.shopify.com/s/files/1/0430/5174/5442/files/fofifitobiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/2109/1484/files/bitol.pdf
    • https://cdn.shopify.com/s/files/1/0431/9677/6607/files/73214826486.pdf
    • https://cdn.shopify.com/s/files/1/0432/5395/6758/files/temufasopenaxixabu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5440/7580/files/nedaliredimugalikokofin.pdf
    • https://cdn.shopify.com/s/files/1/0430/7291/3557/files/43264069461.pdf
    • https://cdn.shopify.com/s/files/1/0434/1740/3559/files/63567419776.pdf
    • https://cdn.shopify.com/s/files/1/0433/3993/9994/files/rimokarejuzita.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_off00005e7b.bin
41a8c902fc0fd04abb3fadd6261065e66d62b2db11987ecbe21da3ec5fbb6f84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7B 5352 bytes
font_01_sfnt_off000070c5.bin
f0ad25cacec90392560ae55f5fadea9531c38be50f8a807361f2d54090fac48c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70C5 10040 bytes

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