Malicious PDF — malware analysis report

Static analysis result for SHA-256 d43d0f17cdfa7c8d…

MALICIOUS

PDF

47.7 KB Created: 2020-08-26 22:40:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1766d3a6f6edbc04d71b59663345a1f SHA-1: 8928df4e2034af91c9c464ce6904fa58f8883d2c SHA-256: d43d0f17cdfa7c8d474d060b89b22d118b50f5ad675143268e5354eb9f5cd9cf
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one critical heuristic identifying it as a redirector to known malicious infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=franchise+manual+template', suggesting a lure related to a franchise manual. The presence of numerous links to Shopify domains, some with generic filenames, indicates a link farm strategy. The ML classifier strongly flagged this PDF as malicious.

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/pify?keyword=franchise+manual+template
    • http://domeno.lincolnleapers.com/uploads/1/3/0/7/130775734/xosudifud.pdf
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/debisofimiwukaka.pdf
    • https://cdn.shopify.com/s/files/1/0433/6903/7982/files/inform_educate_entertain.pdf
    • https://cdn.shopify.com/s/files/1/0428/7945/1289/files/concept_of_habitat_and_ecological_niches.pdf
    • https://cdn.shopify.com/s/files/1/0428/7440/5023/files/xuwegujumezofejimazexod.pdf
    • https://cdn.shopify.com/s/files/1/0429/3846/6471/files/gakero.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/linda_goodman_sun_signs.pdf
    • https://cdn.shopify.com/s/files/1/0432/5716/8027/files/nukunawepekaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0805/6740/files/61818385251.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/zedezotekazi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0935/1578/files/msc_biochemistry_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/6795/7658/files/wufogediragegibotes.pdf
    • https://cdn.shopify.com/s/files/1/0462/6451/6757/files/solar_system_planets_facts.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/
    • https://cdn.shopify.com/s/files/1/0429/3846/6471/files/gakero

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000735a.bin
5238a9cc6e3ef0b97b037454fd4ea8454c550352c80f7ba31fcfed29f1765f3d
pdf-font-stream PDF embedded font (sfnt) at offset 0x735A 5128 bytes
font_01_sfnt_off00008496.bin
09f058b7928befa224c542718bb8658b0c7addc3ce59a8b2b902b797b75a26dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x8496 14804 bytes