Malicious PDF — malware analysis report

Static analysis result for SHA-256 e85031af138f16e3…

MALICIOUS

PDF

135.8 KB Created: 2020-08-09 19:32:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aad0fbf5a36c45e53af7009e5897f475 SHA-1: 6d05aa07ce595f1ab5b4ebe39a642691f7b79821 SHA-256: e85031af138f16e36e72871e2e29b7fd85e71284b1e75535e67f619279dd0e91
150 Risk Score

Malware Insights

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

The PDF was flagged for containing a malicious redirector link and a large number of external PDF links, suggesting a link farm. The primary malicious URL identified is ttraff.ru, which is known to host redirector infrastructure. The document body contains garbled text but also includes the same URL, reinforcing its malicious intent. The presence of numerous PDF links hosted on various domains, including Shopify, indicates an attempt to broaden reach or evade detection.

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.ru/pify?keyword=american+english+file+1+second+edition+pdf
    • http://files.umdfauxpaz.com/uploads/1/3/2/3/132303229/13ce0.pdf
    • http://totumi.domimpr.com/uploads/1/3/0/7/130738914/4666778.pdf
    • http://nalaboj.classcastpodcast.com/uploads/1/3/1/3/131398008/6705659.pdf
    • http://files.precisecatering.com/uploads/1/3/1/3/131384374/dofijimurobu-gedinafudalume-vimalawut.pdf
    • http://files.magnuspolson.co.uk/uploads/1/3/1/4/131438093/7f3ee8db31.pdf
    • https://cdn.shopify.com/s/files/1/0434/6734/1981/files/27825355671.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3581/files/10539725358.pdf
    • https://cdn.shopify.com/s/files/1/0430/8379/2545/files/39189791888.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/90442425312.pdf
    • https://cdn.shopify.com/s/files/1/0428/9311/5558/files/72334709456.pdf
    • https://cdn.shopify.com/s/files/1/0428/2476/1507/files/sovokofinajipowuxizuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/3531/9711/files/78265993259.pdf
    • https://cdn.shopify.com/s/files/1/0431/0168/3873/files/ged_study_guide_2015.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/fezunanamuruxavalopulan.pdf
    • https://cdn.shopify.com/s/files/1/0437/4292/0865/files/aprender_ingls_descargar_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0430/9309/8660/files/13634870948.pdf
    • https://cdn.shopify.com/s/files/1/0436/4291/2926/files/51814321325.pdf
    • https://cdn.shopify.com/s/files/1/0439/1780/3675/files/polipadaroloxawozani.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_off0001c7db.bin
d91f3bb4c4e7555e7cb4c8e7b5872262d01a30dc73abebefe552ce40f8650019
pdf-font-stream PDF embedded font (sfnt) at offset 0x1C7DB 5612 bytes
font_01_sfnt_off0001dacc.bin
d0ec6c93155211e1f6afc0624e3097d6358830b5cf15de853305ef535b619347
pdf-font-stream PDF embedded font (sfnt) at offset 0x1DACC 17320 bytes