Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b070dc6022383b4…

MALICIOUS

PDF

42.3 KB Created: 2020-08-25 05:32:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9dd1d2364648ddb40b39e896ea07c58a SHA-1: 9de48069ce5ad578cbacabd72512c28b2931cdea SHA-256: 6b070dc6022383b4e3b825bd5cc1f4d7a5f2132a606f91a020a1d9f9e609d1f3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to potentially malicious redirectors or unknown domains, suggesting a link farm or SEO poisoning tactic. One prominent link, disguised as a beginner's guide to Python data analysis, redirects to `https://ttraff.cc/pify?keyword=python+data+analysis+for+beginners+pdf`, indicating a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

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=python+data+analysis+for+beginners+pdf
    • http://xajixe.courtneykanigphotography.com/uploads/1/3/2/7/132740900/leweninixagip.pdf
    • http://ziwuwid.uvcheer.com/uploads/1/3/1/4/131453501/nelujarewin-bewawadixevo-nosowe-jukonavu.pdf
    • http://files.heatherrandall.com/uploads/1/3/0/7/130775309/e55ce407.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4914/7816/files/how_to_format_sqlplus_output_in_oracle.pdf
    • https://cdn.shopify.com/s/files/1/0433/8152/2599/files/android_17_18_16.pdf
    • https://cdn.shopify.com/s/files/1/0452/2462/4288/files/bearing_specification_skf.pdf
    • https://cdn.shopify.com/s/files/1/0429/1277/6351/files/belimeforatoxe.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5807/files/35300565755.pdf
    • https://cdn.shopify.com/s/files/1/0432/8154/7424/files/speak_now_1_workbook_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/3577/7445/files/knee_pain_exercise.pdf
    • https://cdn.shopify.com/s/files/1/0435/5306/3063/files/git_add_permission_denied.pdf
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/lesikivedafu.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066bd.bin
d94dbd97b37be5cc2aeb9184d64905069aa54dbef2a437ac7e2fe157144fe904
pdf-font-stream PDF embedded font (sfnt) at offset 0x66BD 5544 bytes
font_01_sfnt_off0000798d.bin
452059963e82933a3794e996e31b68bc7e5fa64a25c25fa1c373647ad32855a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x798D 10208 bytes