Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ded8958c7da28c8…

MALICIOUS

PDF

65.3 KB Created: 2020-08-18 15:49:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 920e1ca186994a700cc7c7ce95748ade SHA-1: d87e60fd1311a67ad6aa6776aceb00b6ae373971 SHA-256: 5ded8958c7da28c8b670f55ef86a093eaf7c9fa52ac0357660664d752a82910f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with a critical heuristic identifying a malicious redirector. The primary malicious URL, 'https://ttraff.com/pify?keyword=clear+acrylic+sheet+properties', is embedded within the document, suggesting a phishing or scam attempt disguised as informational content. 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.com/pify?keyword=clear+acrylic+sheet+properties
    • http://nejajup.westfieldvictory.com/uploads/1/3/0/7/130739379/lemexivarab.pdf
    • http://files.lucindaroweart.com/uploads/1/3/0/7/130776601/6c328.pdf
    • http://files.swe-rms.org/uploads/1/3/2/8/132816165/sovatipupi.pdf
    • http://files.seancotton.com/uploads/1/3/2/7/132741302/rimejefar-jalesunapiwigej-xiwolumaj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tedogunugovosilogupex.pdf
    • https://cdn.shopify.com/s/files/1/0429/5675/1002/files/gastroenteritis_aguda_en_adultos.pdf
    • https://cdn.shopify.com/s/files/1/0437/4423/1575/files/55222491878.pdf
    • https://cdn.shopify.com/s/files/1/0431/7904/9121/files/fapinuzo.pdf
    • https://cdn.shopify.com/s/files/1/0439/4539/4331/files/dikufozorubosugik.pdf
    • https://cdn.shopify.com/s/files/1/0431/6938/2557/files/xefalubinenavefixemoge.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65022979336.pdf
    • https://cdn.shopify.com/s/files/1/0434/6911/1449/files/wadenakiwimipisunafeteful.pdf
    • https://cdn.shopify.com/s/files/1/0433/5419/4085/files/jizitigefamamerokav.pdf
    • https://cdn.shopify.com/s/files/1/0437/7473/8586/files/buwaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/0962/1665/files/solidworks_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/4152/0790/files/acceptable_forms_of_id_for_i9.pdf
    • https://cdn.shopify.com/s/files/1/0429/6910/4540/files/preparation_of_saturated_calomel_electrode.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_off0000c1cc.bin
8bd6938d793ad0eab7246a3da421b51de3d0f06b874d7672a5c7f3e0cf4217ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1CC 5028 bytes
font_01_sfnt_off0000d2dd.bin
593e583c0de68a1a83edad0a25b0aebf974b4ce8cf7caf298962452223106acf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2DD 10892 bytes

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