Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cd6056f5b9f4f21…

MALICIOUS

PDF

40.0 KB Created: 2020-08-21 07:25:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e15645034365ccf475593a5c85fd75d8 SHA-1: b6c2aabe79a7296515394666a7dbec21581ffd4f SHA-256: 0cd6056f5b9f4f2113b21c94bb194ed9c059585a17e95b89dd3bb0f5abf2a105
154 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=aeroplane+ka+photo' which is flagged as a malicious redirector. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or a phishing attempt disguised as a document repository.

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=aeroplane+ka+photo
    • http://tofanepuf.lawncarenewburgh.com/uploads/1/3/1/6/131637016/mesabesikamolelu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/0328/0551/files/xumazajevobokizi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4002/1407/files/furuvujo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2117/2897/files/73490400551.pdf
    • https://cdn.shopify.com/s/files/1/0427/7154/6279/files/ragapekuxutoduguwos.pdf
    • https://cdn.shopify.com/s/files/1/0435/1698/5503/files/ascii_table_extended.pdf
    • https://cdn.shopify.com/s/files/1/0450/4210/6518/files/remnant_from_the_ashes_cheat_engine.pdf
    • https://cdn.shopify.com/s/files/1/0427/9848/1564/files/for_instruction_in_righteousness.pdf
    • https://cdn.shopify.com/s/files/1/0436/4229/0336/files/somivizatemuporo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7222/5442/files/73955009746.pdf
    • https://cdn.shopify.com/s/files/1/0439/0407/3883/files/gexazuke.pdf
    • https://cdn.shopify.com/s/files/1/0430/9182/0711/files/jedupatesebizus.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004bf0.bin
8fd6b244f858317d2fe55d1613eaa8e3c7d1efbde48a9c1bc4f625f6ca628038
pdf-font-stream PDF embedded font (sfnt) at offset 0x4BF0 4520 bytes
font_01_sfnt_off00005b31.bin
70d3e01da785fd43f80c1dacbfeafcc1a8335e445bb00072f8428d3015c1950c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B31 13412 bytes
font_02_sfnt_off00008596.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8596 4324 bytes