Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fe2670b8bb88413…

MALICIOUS

PDF

33.7 KB Created: 2020-08-19 02:29:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 333da74603f5954d2622142108eed989 SHA-1: db1f7c4d08010d07bfc682bf21ae66f57c282ade SHA-256: 7fe2670b8bb8841379492002f998ba48d307ac4c2eff5e4b592e7707a392a4e3
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=baking+sheet+with+rack+set'. The document body, though heavily obfuscated, contains similar text and numerous links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The primary intent appears to be directing users to the malicious redirector.

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=baking+sheet+with+rack+set
    • http://files.typebtriathlete.com/uploads/1/3/0/7/130739039/8862471.pdf
    • http://files.lisleband.com/uploads/1/3/0/7/130776228/2113790.pdf
    • https://cdn.shopify.com/s/files/1/0428/5746/3971/files/56569889610.pdf
    • https://cdn.shopify.com/s/files/1/0428/1679/8883/files/nuxorodebexutibidevu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7417/5644/files/powerpoint_medical_templates.pdf
    • https://cdn.shopify.com/s/files/1/0432/9242/6405/files/20203120302.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/2000/files/revilodan.pdf
    • https://cdn.shopify.com/s/files/1/0428/3305/1814/files/adobe_flash_player_npapi_latest_version.pdf
    • https://cdn.shopify.com/s/files/1/0431/1433/2309/files/42457589383.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3135/files/86402407387.pdf
    • https://cdn.shopify.com/s/files/1/0431/0754/9338/files/algebraic_expressions_class_6.pdf
    • https://cdn.shopify.com/s/files/1/0429/4085/8527/files/jnv_registration_form.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_off00004648.bin
1560539403a0cc33f37cee76fb3c3397b3c14dba7673864665d3251b12c42c24
pdf-font-stream PDF embedded font (sfnt) at offset 0x4648 5236 bytes
font_01_sfnt_off00005820.bin
a258c776faeb810886b9a5d5441b875041279b62cb6b10c613ecfa6501651f06
pdf-font-stream PDF embedded font (sfnt) at offset 0x5820 9960 bytes