Malicious PDF — malware analysis report

Static analysis result for SHA-256 71dd7bfc5dbdbe47…

MALICIOUS

PDF

54.0 KB Created: 2020-08-31 07:05:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4b78bd0c1e6fad3308a7d446b3df68b SHA-1: b4e809bcdae4cc774a7d0ea4caf72ed80b1be70f SHA-256: 71dd7bfc5dbdbe47f7c53619e0bd03e40a64cb6ca79cb422e2926e196bf2517f
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://ttraff.com/wix?keyword=gta+lyari+express+aeroplane+cheats+codes, is identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to search queries, suggesting a phishing or scam attempt. The presence of numerous external links, many pointing to Shopify, indicates a link farm used to distribute malicious content.

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=gta+lyari+express+aeroplane+cheats+codes
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/1778/9862/files/basic_english_grammar_usage.pdf
    • https://cdn.shopify.com/s/files/1/0435/6590/8123/files/athlean_x_ultimate_arms_free_dow.pdf
    • https://cdn.shopify.com/s/files/1/0434/9889/7574/files/wawawatuxox.pdf
    • https://cdn.shopify.com/s/files/1/0437/6703/8109/files/68392913469.pdf
    • https://cdn.shopify.com/s/files/1/0429/0789/3919/files/vugebatasupewewozexufasur.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/bosch_dishwasher_installation_rebate_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/6645/8266/files/alfabeto_portugues.pdf
    • https://cdn.shopify.com/s/files/1/0435/1367/5928/files/36520729281.pdf
    • https://cdn.shopify.com/s/files/1/0433/3817/0526/files/fixed_asset_lead_schedule_template.pdf
    • https://static.usrfiles.com/ugd/bb13a2_d1c3b9e6e3384a2e9aac1e9655314e71.pdf
    • https://static.usrfiles.com/ugd/6da380_0d5a67b62b474b75bc24cd7891f5e122.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc382d467c754a869cd3d621bcb08ec2.pdf
    • https://static.usrfiles.com/ugd/90423f_1efc2e72a14b4066b0bbcdaa361f90a7.pdf
    • https://static.usrfiles.com/ugd/c3f88d_ad51cfbacff94dcea805e810516b9640.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_off0000928f.bin
165be564fe227caa9a729102f450034af7c72c6e0eb343d6302e77309f6d80f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x928F 5364 bytes
font_01_sfnt_off0000a4cc.bin
d9c77d9dde29a081a9237d01400b4b430e18cf33e0bef178df37e6e36f907d1d
pdf-font-stream PDF embedded font (sfnt) at offset 0xA4CC 11156 bytes