Malicious PDF — malware analysis report

Static analysis result for SHA-256 befd20fdba6e113a…

MALICIOUS

PDF

41.7 KB Created: 2020-08-19 14:26:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a94b9d922dc843bc153023606802bad0 SHA-1: 608be17282cd1e79020080d1592936aa258b5d6a SHA-256: befd20fdba6e113a01a0352c2904b040844b1c1ecc6d7bd112aa606967e77427
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The embedded URL 'https://ttraff.ru/pify?keyword=boeing+747+weight+and+balance+manual' is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and appears to be a lure related to 'Boeing 747 weight and balance manual'. The presence of numerous Shopify-hosted PDF links, even if some are benign, contributes to the overall suspicious nature of the document as a potential distribution point for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=boeing+747+weight+and+balance+manual
    • http://files.sofiaelghazzali.com/uploads/1/3/2/3/132303083/8317385.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53978683100.pdf
    • https://cdn.shopify.com/s/files/1/0433/9931/5619/files/96764421458.pdf
    • https://cdn.shopify.com/s/files/1/0430/8818/3456/files/porepawaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0234/files/medojujamazut.pdf
    • https://cdn.shopify.com/s/files/1/0432/5936/3488/files/enlaces_covalentes_y_ionicos.pdf
    • https://cdn.shopify.com/s/files/1/0431/3710/6087/files/yelp_review_email_template.pdf
    • https://cdn.shopify.com/s/files/1/0440/0090/3318/files/annual_credit_report_request_form_fillable.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/35125111927.pdf
    • https://cdn.shopify.com/s/files/1/0446/5026/6787/files/gumufetesusul.pdf
    • https://cdn.shopify.com/s/files/1/0433/7133/1734/files/biochemistry_review.pdf
    • https://cdn.shopify.com/s/files/1/0430/7720/6165/files/overview_of_computer_architecture_and_organization.pdf
    • https://cdn.shopify.com/s/files/1/0433/0124/0985/files/88507224159.pdf
    • https://cdn.shopify.com/s/files/1/0432/3796/5986/files/kotor_lightsaber_crystals.pdf
    • https://cdn.shopify.com/s/files/1/0431/4487/2090/files/vavibemapojuvujekawovaze.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_off000064ed.bin
cc3a678e7642d7d2cad7189072f7ff6ef2bfabd28c2e13131827cfd4f3af3b53
pdf-font-stream PDF embedded font (sfnt) at offset 0x64ED 5528 bytes
font_01_sfnt_off000077ae.bin
5d1a0e1cd828186b5fb2bd30ae7c03740640da765ddc77179ff5507d5fbf173d
pdf-font-stream PDF embedded font (sfnt) at offset 0x77AE 10032 bytes