Malicious PDF — malware analysis report

Static analysis result for SHA-256 071ec5033b288f3d…

MALICIOUS

PDF

57.6 KB Created: 2020-08-29 08:02:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3f87232e7cee251c8e1eb435491bb05 SHA-1: f8c8aaa92cf25e78d03b5095710fab63db117a68 SHA-256: 071ec5033b288f3d649bef3f1cd692b5fb802fd6111fe55a3b1f56d5a78c8c5c
154 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same URL, suggesting a phishing or scam attempt. The ML classifier also strongly indicated maliciousness.

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.ru/wix?keyword=fce+reading+test+with+answers
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6940/6360/files/creative_catalogue_design.pdf
    • https://cdn.shopify.com/s/files/1/0433/4069/3662/files/vimivibejo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0659/0106/files/xobujakixovofoxodepines.pdf
    • https://cdn.shopify.com/s/files/1/0433/4456/0281/files/asus_gpu_tweak_2_guide_gtx_1070.pdf
    • https://cdn.shopify.com/s/files/1/0432/6549/1107/files/42961856446.pdf
    • https://cdn.shopify.com/s/files/1/0432/1070/3012/files/22008498975.pdf
    • https://cdn.shopify.com/s/files/1/0439/1357/6603/files/difference_between_formation_and_tactics_in_football.pdf
    • https://cdn.shopify.com/s/files/1/0431/4277/4935/files/effect_of_shisha_smoking.pdf
    • https://cdn.shopify.com/s/files/1/0438/6573/5328/files/63907391529.pdf
    • https://cdn.shopify.com/s/files/1/0433/4845/9675/files/reneno.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7624/files/62159899069.pdf
    • https://cdn.shopify.com/s/files/1/0438/8664/1304/files/41034126928.pdf
    • https://cdn.shopify.com/s/files/1/0429/7064/4631/files/42804065441.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/muzoguganava.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_off0000966b.bin
956fbc64d9a26c185e284da81e3436b203554fbd8180674f96942b0a768c5407
pdf-font-stream PDF embedded font (sfnt) at offset 0x966B 5216 bytes
font_01_sfnt_off0000a82d.bin
9ec98c10f1df545487705be8a56af24d158b05da9a7cad87e1d748a08a8eaa62
pdf-font-stream PDF embedded font (sfnt) at offset 0xA82D 17016 bytes