Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8ce0177b2d36061…

MALICIOUS

PDF

71.5 KB Created: 2020-08-09 09:25:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab60a634afbc85cbf83fc03385f5614c SHA-1: 7a8e096c0f966ab23cd47bb62fcfe7da5cd3678d SHA-256: f8ce0177b2d36061da30a04f67d024d84ebb40b443c28eb9bee36a0c9a919b92
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This suggests a link farm technique designed to obscure the malicious destination, likely a phishing or malware delivery site. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=general+ability+test+papers+pdf', reinforcing the lure of test papers to entice clicks.

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=general+ability+test+papers+pdf
    • http://files.graceelmira.org/uploads/1/3/0/8/130874634/574839d1a95.pdf
    • http://files.guitaravenue-sg.com/uploads/1/3/1/3/131380343/5745034.pdf
    • http://giwale.standstrongcoalition.com/uploads/1/3/0/7/130776433/9d9ce476a311.pdf
    • https://cdn.shopify.com/s/files/1/0430/8179/3698/files/aia_g701_form.pdf
    • https://cdn.shopify.com/s/files/1/0434/0531/2163/files/introduction_to_electrodynamics_griffiths_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/59001898006.pdf
    • https://cdn.shopify.com/s/files/1/0448/5169/1680/files/3ds_max_tutorials.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/1999/files/character_design_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/4565/6488/files/behavior_modification_for_adhd.pdf
    • https://cdn.shopify.com/s/files/1/0447/9716/5728/files/an_astrologer_s_day_essay.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/sabar.pdf
    • https://cdn.shopify.com/s/files/1/0435/0607/3759/files/foxit_reader_for_mac_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/2449/8343/files/96233538388.pdf
    • https://cdn.shopify.com/s/files/1/0435/0207/6070/files/ximiletutaletifafajak.pdf
    • https://cdn.shopify.com/s/files/1/0430/3945/7429/files/neluxukan.pdf
    • https://cdn.shopify.com/s/files/1/0432/5041/7827/files/gilakijifaj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdcd.bin
ae8b1bd36fca9b132a1e18cb299b4b9a4a6f60c64afdd92c71896bcc6fd175ed
pdf-font-stream PDF embedded font (sfnt) at offset 0xCDCD 4988 bytes
font_01_sfnt_off0000ded0.bin
190cb4921736b189132d416d74443c553877c031179745fd96e6fe7d90ad5593
pdf-font-stream PDF embedded font (sfnt) at offset 0xDED0 10588 bytes
font_02_sfnt_off000102b4.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x102B4 4324 bytes