Malicious PDF — malware analysis report

Static analysis result for SHA-256 222cf89ac49efed8…

MALICIOUS

PDF

51.5 KB Created: 2020-08-07 05:45:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 352351c2f9af9a554c9d99e51fe4b349 SHA-1: 7554799fc7da3ed99179bcc07dc601a437a64f45 SHA-256: 222cf89ac49efed82cfb7e062633c8088781648c6d8e9738186c09d3cff978c4
152 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Shopify domains, which is characteristic of a link farm designed to obscure malicious destinations. One of the primary links, 'https://ttraff.cc/pify?keyword=armenian+english+dictionary+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains the same lure text and URL, reinforcing the malicious intent. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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.cc/pify?keyword=armenian+english+dictionary+pdf
    • http://files.casalatinosunidos.org/uploads/1/3/2/6/132696030/75d1c.pdf
    • http://files.planititineraries.com/uploads/1/3/1/4/131407698/jikat.pdf
    • http://files.artisaknity.com/uploads/1/3/1/4/131437983/jejunotomeno.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6248/files/viwefi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9229/6358/files/46497805049.pdf
    • https://cdn.shopify.com/s/files/1/0435/4631/2863/files/soxexigosozikebimamovaja.pdf
    • https://cdn.shopify.com/s/files/1/0431/7691/9194/files/87300619299.pdf
    • https://cdn.shopify.com/s/files/1/0428/1637/2892/files/mass_gain_workout_program.pdf
    • https://cdn.shopify.com/s/files/1/0434/3329/6028/files/2016_toyota_camry_se_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/4160/2198/files/lazipigozu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2432/6566/files/54393238321.pdf
    • https://cdn.shopify.com/s/files/1/0434/5122/0133/files/45531841459.pdf
    • https://cdn.shopify.com/s/files/1/0431/9186/1412/files/xidezipadobanonewirul.pdf
    • https://cdn.shopify.com/s/files/1/0437/4711/5157/files/kivepesak.pdf
    • https://cdn.shopify.com/s/files/1/0428/7945/1289/files/bexakuxanajol.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/kamamokawosaboluz.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_off00005abc.bin
5da06201e8d9abb83f796ad48656a1a0f193a162f7c81c294a69efd2e9169596		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ABC 5448 bytes
font_01_sfnt_off00006d0e.bin
b81359de1dbf56ad4009831637780331c770f5f31d9620afedacc184989b746d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0E 10836 bytes
font_02_sfnt_off00009176.bin
eee17fa49e9262d7b513ce26bcd66f478b93ddaef88ec11f532179ed882324ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9176 20168 bytes
font_03_sfnt_off0000b24b.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB24B 4324 bytes

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