Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c96bcda032560a0…

MALICIOUS

PDF

40.6 KB Created: 2020-09-02 00:23:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0eac4dc4df9fa2367d0992bad8c079e4 SHA-1: 88e17e03cd370550b5c302dc25c9b0a96a3909e7 SHA-256: 9c96bcda032560a04fe729edd197672a3d9f2629c56a20877920b37dc4b2830c
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=live+tv+app+apk+2018'. Additionally, another critical heuristic indicates a PDF link farm, with 'https://static.usrfiles.com/ugd/b8c837_6addfa1903ca4b7481afaf82ee466e43.pdf' being the first identified URL in this farm. The ML classifier also strongly flagged this PDF as malicious. The document body contains the malicious URL and appears to be a lure for a 'live tv app apk 2018'.

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.com/wix?keyword=live+tv+app+apk+2018
    • https://static.usrfiles.com/ugd/b8c837_6addfa1903ca4b7481afaf82ee466e43.pdf
    • https://static.usrfiles.com/ugd/a1fb72_0339606b9bfb41ca94879aafe2964ced.pdf
    • https://static.usrfiles.com/ugd/b8c837_82ffa41a2f0a4ea58ef08650f38e5c37.pdf
    • https://static.usrfiles.com/ugd/b8c837_41d65520ceb94e2ca7dbe8c289eb4f64.pdf
    • https://cdn.shopify.com/s/files/1/0433/4849/2438/files/new_ballard_score_chart.pdf
    • https://cdn.shopify.com/s/files/1/0433/8099/8298/files/75177407868.pdf
    • https://cdn.shopify.com/s/files/1/0458/5770/2041/files/zajuti.pdf
    • https://cdn.shopify.com/s/files/1/0432/2508/8168/files/leiomyomatosis_treatment_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0433/5150/7112/files/vofiz.pdf
    • https://static.usrfiles.com/ugd/16a96a_06d8f93929c9438f8899335731dd5be7.pdf
    • https://static.usrfiles.com/ugd/f8de3e_11ace995d1b84f018819cd6ce1510929.pdf
    • https://static.usrfiles.com/ugd/a474dd_f0484d071775421fa462022f2d7eab95.pdf
    • https://static.usrfiles.com/ugd/e4ff69_52e2e037c38e4440aa68364f73aeba72.pdf
    • https://static.usrfiles.com/ugd/1e32c2_83771df8dc354c018cdc117928cbd166.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_off00006281.bin
2f1439775387b48df827a777c0eefeb4f279f27de203c9eb8cc112fb280f7060
pdf-font-stream PDF embedded font (sfnt) at offset 0x6281 5092 bytes
font_01_sfnt_off000073fa.bin
56604d22d558b92992a800f707eb0d14ad5d16ef2b90b1889b3d459a920f517f
pdf-font-stream PDF embedded font (sfnt) at offset 0x73FA 10000 bytes