Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0f6a2fd404bee42…

MALICIOUS

PDF

54.4 KB Created: 2020-08-21 19:32:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5d3d4922847d15c667789e6789f3595 SHA-1: 333d1df7fcf8f8c6c95e44a0fe76aa3366e42c5c SHA-256: c0f6a2fd404bee4225e5e268051debc553fba4c6911d6f4afd8fffb35c1a65b3
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=new+hd+movies++telugu+2018', is flagged as a malicious redirector. The document also features a link farm pointing to numerous PDFs hosted on cdn.shopify.com, suggesting an attempt to manipulate search engine results or distribute content. The ML classifier strongly indicated maliciousness, supporting the conclusion that this document is designed to redirect users to harmful sites.

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=new+hd+movies++telugu+2018
    • http://nolila.vickijansma.com/uploads/1/3/1/1/131164250/1322508.pdf
    • http://bogim.bespokeoff-road.com/uploads/1/3/1/3/131380429/9b2c1307.pdf
    • https://cdn.shopify.com/s/files/1/0432/8397/2256/files/psychological_contract_theory.pdf
    • https://cdn.shopify.com/s/files/1/0435/8068/6497/files/japironuwoxevuk.pdf
    • https://cdn.shopify.com/s/files/1/0439/1721/3864/files/hypothetical_situations_esl_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0435/2458/7672/files/salarupifazogasijetag.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1571/files/repesofuwidavonedikavufu.pdf
    • https://cdn.shopify.com/s/files/1/0439/4621/3544/files/69440265282.pdf
    • https://cdn.shopify.com/s/files/1/0434/2136/8482/files/xanofunoferemilulisa.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/magus_guide_pathfinder.pdf
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/zoralolomakurudox.pdf
    • https://cdn.shopify.com/s/files/1/0433/2896/2715/files/ielts_academic_reading_exam.pdf
    • https://cdn.shopify.com/s/files/1/0463/2166/4160/files/fumabuligavikot.pdf
    • https://cdn.shopify.com/s/files/1/0431/8691/3437/files/romuxagiko.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c86.bin
c9bfa1ef5f7eaca76b5c93529e30a4ea32ca5e2ba8ef143e59ee7d84ac467c59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C86 5576 bytes
font_01_sfnt_off00007f88.bin
cb30ccbe3470e24abea742643761fe43cfe74664858df86eeeab0c9a4c342ab2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F88 20968 bytes
font_02_sfnt_off00009fb7.bin
bad47d694a1dd9c664d92593e9aa530dcfdac95caf8f68d8ad6f6049d2ff5117		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FB7 2276 bytes
font_03_sfnt_off0000a983.bin
e4bc0b9a61578d3184d8e93e44ce70197d0cea5f04dd9d1b30a1c271b10a41c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA983 10144 bytes

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