Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad2681a886231721…

MALICIOUS

PDF

43.0 KB Created: 2020-08-20 06:41:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb17c29d5cc938954ba179d336d920d6 SHA-1: 646b3c88720db974d5971a581609a94c0f1e89aa SHA-256: ad2681a886231721491e33f4af8f2aa1148b05562f5d206cb6d0d27b5c64f1ff
152 Risk Score

Malware Insights

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

The PDF document contains embedded links that lead to a redirector service, which in turn points to a link farm hosted on Shopify. The primary malicious link is to 'ttraff.ru', identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'sales action plan template xls' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier strongly flagged this PDF as malicious.

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=sales+action+plan+template+xls
    • http://jetijeg.towncreekvision.com/uploads/1/3/1/4/131438177/68ffce5b286c.pdf
    • http://vufozoz.alex-chien.com/uploads/1/3/0/8/130814328/gavuvefo.pdf
    • http://files.ikaruscoffee.co.nz/uploads/1/3/1/3/131379732/dafixidiredozile.pdf
    • http://tazex.p3oriontopsecret.com/uploads/1/3/1/3/131380600/renedutos-penepag-dojuxezoguzij-niramifevaleso.pdf
    • http://bigexav.spectrumpsychological.net/uploads/1/3/0/7/130739124/suxojipadimoribi.pdf
    • https://cdn.shopify.com/s/files/1/0440/3780/0086/files/nero_burning_rom_2018_crack_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/9107/4976/files/definition_of_toxicity_testing.pdf
    • https://cdn.shopify.com/s/files/1/0434/8408/6424/files/xidoluxiridovupa.pdf
    • https://cdn.shopify.com/s/files/1/0439/8543/6830/files/dixabupedaxipupulamogulek.pdf
    • https://cdn.shopify.com/s/files/1/0438/2323/5234/files/subspace_emissary_world_conquest.pdf
    • https://cdn.shopify.com/s/files/1/0439/8238/9406/files/98213210667.pdf
    • https://cdn.shopify.com/s/files/1/0430/2215/5930/files/the_importance_of_the_asset_allocation_decision.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/67110197506.pdf
    • https://cdn.shopify.com/s/files/1/0434/0056/0805/files/zojotuna.pdf
    • https://cdn.shopify.com/s/files/1/0437/9528/4130/files/5978519725.pdf
    • https://cdn.shopify.com/s/files/1/0432/3590/1602/files/58567495880.pdf
    • https://cdn.shopify.com/s/files/1/0430/6026/5117/files/xowinod.pdf
    • https://cdn.shopify.com/s/files/1/0429/5753/7439/files/beneficios_de_una_alimentacion_saludable_en_nios.pdf
    • https://cdn.shopify.com/s/files/1/0430/1992/7713/files/bowesekilalawavaxig.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_off00006c27.bin
ca8e7d1058463d9506cf92ab0bfbb5c92e0b9e94b1ed82b14591a3b3bd3a1150		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C27 5152 bytes
font_01_sfnt_off00007d95.bin
824ecb07344d1bc4d4306347bea58b803be9525ae7d32075ac4562e03a5a8ad3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D95 9692 bytes

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