Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8d387815e339fd5…

MALICIOUS

PDF

52.1 KB Created: 2020-08-07 07:37:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 300a8792835ea0e28c96e3a2ffd062b0 SHA-1: e1d025401466101d77d8c8ec83ca007bb0db7b17 SHA-256: f8d387815e339fd5d154a889fbee29f7014a0829ffefee8152fb68ed2ed35a48
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

This PDF file was identified as malicious due to its inclusion of a link to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=cetocort+pomada+bula+pdf'. The document also contains a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly indicated maliciousness, and the document body, though heavily obfuscated, contains the target URL.

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=cetocort+pomada+bula+pdf
    • http://files.mazarchery.com/uploads/1/3/2/6/132682134/9294203.pdf
    • http://files.harmonie-concert-band.org/uploads/1/3/1/3/131380754/mavufopanugo.pdf
    • http://files.videopeople360.com/uploads/1/3/1/6/131637302/4268638.pdf
    • http://files.planetsandhollywood.com/uploads/1/3/2/8/132815008/pafakisa.pdf
    • http://files.g-force.org.uk/uploads/1/3/2/6/132681342/mugilovozakuveporevo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5361/2182/files/54711033198.pdf
    • https://cdn.shopify.com/s/files/1/0432/4114/4483/files/34155517267.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7711/files/guzibaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63912397784.pdf
    • https://cdn.shopify.com/s/files/1/0434/6989/7878/files/57482074048.pdf
    • https://cdn.shopify.com/s/files/1/0434/0609/8597/files/jamal_ad_din_al_afghani.pdf
    • https://cdn.shopify.com/s/files/1/0430/1121/1425/files/academic_research_paper_example.pdf
    • https://cdn.shopify.com/s/files/1/0431/0351/8882/files/69936757154.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nasodidupafulad.pdf
    • https://cdn.shopify.com/s/files/1/0444/2678/9030/files/le_grand_livre_du_bouddhisme.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/nemogejodavorowaze.pdf
    • https://cdn.shopify.com/s/files/1/0429/6481/1927/files/fukakata.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/1/0429/6481/1927/files/fuka

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008df0.bin
b2e4c5b2f238e6eeb20f378c7c23fe30699a8e04bbe8b10932734b04a8548fb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DF0 5168 bytes
font_01_sfnt_off00009f65.bin
3935abcd460acc49373d312253bd3250cbbf3ad6d1e7573f57cfda005c3140a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F65 10548 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.