Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ed6033efc4f6978…

MALICIOUS

PDF

38.9 KB Created: 2020-08-12 01:46:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ded8e11db32c273e9b13ddb7b30a4780 SHA-1: 24eac8a01d18643812f94fe41cb0747153340e44 SHA-256: 9ed6033efc4f6978b3f3f130d9bd62fb8f9722f823270ca546de6305a96c3035
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.cc). This suggests a link farm or SEO poisoning tactic to drive traffic to malicious sites. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the text 'Effective public relations 11th edition pdf' and the malicious URL, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.cc/pify?keyword=effective+public+relations+11th+edition+pdf
    • http://files.susangaylord.com/uploads/1/3/0/7/130739265/bodagatemevozis.pdf
    • http://files.blacktidefishing.com/uploads/1/3/0/8/130874612/nabuvog.pdf
    • http://jaliduw.kidsaroundaustin.com/uploads/1/3/0/7/130775971/pikironijelejod.pdf
    • http://kawadumo.busynestnews.com/uploads/1/3/1/4/131453028/detojunilosisuw.pdf
    • https://cdn.shopify.com/s/files/1/0436/0096/9896/files/38363650245.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/96509181728.pdf
    • https://cdn.shopify.com/s/files/1/0435/9330/2178/files/dajozimepepaje.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/talijofazejodo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9898/8954/files/bumefemirezugojamazeloba.pdf
    • https://cdn.shopify.com/s/files/1/0439/3258/2056/files/5495147064.pdf
    • https://cdn.shopify.com/s/files/1/0433/2794/6904/files/38026028920.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/defitanejojoti.pdf
    • https://cdn.shopify.com/s/files/1/0434/5898/6150/files/13800247276.pdf
    • https://cdn.shopify.com/s/files/1/0431/1236/6241/files/refraction_of_light_through_prism.pdf
    • https://cdn.shopify.com/s/files/1/0433/5566/8639/files/all_caste_list_in_tamilnadu.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_off00005697.bin
2aafbdca27b46d781ad3f5a35f28fd738c83f10987a99c70973d721de1a72a44
pdf-font-stream PDF embedded font (sfnt) at offset 0x5697 5452 bytes
font_01_sfnt_off0000691b.bin
fcb3d3e2550ee27b12f6414f3dbc0906d1da7f13fa528c624e5ccf174e814bae
pdf-font-stream PDF embedded font (sfnt) at offset 0x691B 10456 bytes