Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c6317cbe8fb386d…

MALICIOUS

PDF

41.2 KB Created: 2020-08-07 14:57:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abab16436713783d6bd54f0d8df6dacd SHA-1: f8861a587e32cb62ccde04357b8d73d80efda9a2 SHA-256: 7c6317cbe8fb386d40658e43eb65bb4426d662d3f626461b19d4ebc2566bbe2f
150 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, forming a link farm designed to obscure the ultimate destination. One of the primary links, 'https://ttraff.ru/pify?keyword=pumpkin+carving+stencils+pdf', is identified as a malicious redirector. This suggests the document's purpose is to lure users through a series of redirects to a malicious site, likely for phishing or malware delivery. The ML classifier strongly supports the malicious nature of this PDF.

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=pumpkin+carving+stencils+pdf
    • http://files.gantshillurc.co.uk/uploads/1/3/1/6/131637649/3173850.pdf
    • http://files.springbreakkenya.org/uploads/1/3/1/1/131163833/xasovize_lireboje_xowiditopaxed.pdf
    • http://files.simcoshelties.net/uploads/1/3/2/6/132681992/jopekud-zobaledujelulud-zifuj.pdf
    • http://files.isr2020.org/uploads/1/3/2/6/132695881/soxid-kavob-lenusoda.pdf
    • http://files.shawtyreservices.com/uploads/1/3/2/6/132681634/jonafotejotadise.pdf
    • https://cdn.shopify.com/s/files/1/0428/9924/3174/files/jolikepapunanigeselusepov.pdf
    • https://cdn.shopify.com/s/files/1/0449/5890/8584/files/imf_bentham_annual_report_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/1083/4077/files/one_fish_two_fish_red_fish_blue_fish_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/0741/0329/files/english_basic_grammar_learning_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/lewajegupiwojorefifire.pdf
    • https://cdn.shopify.com/s/files/1/0438/0344/3361/files/lelomuxijaxewosikazik.pdf
    • https://cdn.shopify.com/s/files/1/0439/9972/3678/files/36268699360.pdf
    • https://cdn.shopify.com/s/files/1/0438/0898/1153/files/4264007086.pdf
    • https://cdn.shopify.com/s/files/1/0438/0216/5410/files/can_t_hold_us_clean.pdf
    • https://cdn.shopify.com/s/files/1/0434/4732/0728/files/lujagasuwezojorulomutaro.pdf
    • https://cdn.shopify.com/s/files/1/0432/3255/9263/files/ford_focus_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/campbell_biology_10th_edition_torrent.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_off0000644d.bin
f285258e3f35c11af39689c9c86ba39ab73e442ef223ddbb5b54589413652bd2
pdf-font-stream PDF embedded font (sfnt) at offset 0x644D 5600 bytes
font_01_sfnt_off0000774c.bin
a799075831e7a92f12d67552b4e983bafe5c7250e003587dd656785551ca51c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x774C 9572 bytes