Malicious PDF — malware analysis report

Static analysis result for SHA-256 afa74226d57c5db7…

MALICIOUS

PDF

42.2 KB Created: 2020-08-18 16:25:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 114d9d5f3004752ee94c27fce317c1df SHA-1: d510bbe6160871100d56011f808a2e63db16f70e SHA-256: afa74226d57c5db7073b4de5c934efe202ae9ae9f65341fe2c3bcab2f119425f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body also contains this URL, alongside numerous other links to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning tactic. The ML classifier also strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to a malicious site.

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/pify?keyword=oblivion+piano+sheet+music+free
    • http://files.boingkids.co.uk/uploads/1/3/0/8/130814907/8a4cd6d.pdf
    • http://diwoguxi.americaninteriordesigncenter.com/uploads/1/3/0/7/130775982/3152086.pdf
    • http://files.anythinggoescustomcycles.com/uploads/1/3/1/1/131163590/2491591.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2622/files/organization_theory_and_design_12th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/7713/1683/files/shapes_of_molecules_and_bond_angles.pdf
    • https://cdn.shopify.com/s/files/1/0429/9482/7418/files/roses_bokeh_images_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/1153/7053/files/87957994583.pdf
    • https://cdn.shopify.com/s/files/1/0432/2938/0767/files/abap_development_for_s_4hana.pdf
    • https://cdn.shopify.com/s/files/1/0436/0473/8206/files/pomobujipa.pdf
    • https://cdn.shopify.com/s/files/1/0439/8697/6926/files/core_questions_in_philosophy_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/8577/4502/files/best_pickaxe_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0435/5706/0769/files/69448151484.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49186839350.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rojifibopi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6855/5415/files/78700235781.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_off0000560e.bin
3013397303ba184ecd70ba1fc6acbde63ef9eb59c9648c1935deefb586688616
pdf-font-stream PDF embedded font (sfnt) at offset 0x560E 5480 bytes
font_01_sfnt_off00006881.bin
b2284dd64d8adb3209375518b26ba73d5c92c7c9bbc70b82b81bc8ee9a477ac5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6881 15772 bytes