Malicious PDF — malware analysis report

Static analysis result for SHA-256 48e173d697a89a11…

MALICIOUS

PDF

46.1 KB Created: 2020-08-08 01:27:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc9b5afe6c9e0f51b8ac7aed3a029210 SHA-1: cc6dc21f270ac4983c3315e1f3b5e2fc843ffd59 SHA-256: 48e173d697a89a11e08a3cc0bdadf8e0036ea9e5b5e8a86f808888e19a6491ea
152 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by a machine learning classifier and contains numerous embedded links. One critical heuristic identified a link to a known malicious redirector service, ttraff.cc, which likely serves to obscure the ultimate destination of the payload. Another heuristic detected a large PDF link farm, suggesting an attempt to manipulate search engine results or distribute content broadly. The document body contains garbled text and what appears to be metadata from the wkhtmltopdf tool, indicating it was likely generated programmatically for malicious purposes.

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=automotive+industry+in+pakistan+pdf
    • http://files.eaglenewark.com/uploads/1/3/0/7/130739766/6909232.pdf
    • http://jovojazat.zoomerman.net/uploads/1/3/0/7/130776054/gopemog_vomuxosobolaz.pdf
    • http://baleweme.sweetnellie.com/uploads/1/3/1/0/131070859/domuratikeniw-ramunuvaxasaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/8991/1194/files/levofedofizatezenes.pdf
    • https://cdn.shopify.com/s/files/1/0437/8856/6680/files/25456781734.pdf
    • https://cdn.shopify.com/s/files/1/0431/4267/6648/files/golisunijim.pdf
    • https://cdn.shopify.com/s/files/1/0427/6345/2583/files/fundamentals_of_molecular_spectroscopy_c_n_banwell_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/pdf_booklet_printing_mac.pdf
    • https://cdn.shopify.com/s/files/1/0436/0408/2851/files/social_media_strategy_for_nonprofits.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/71660651408.pdf
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/xilalawasum.pdf
    • https://cdn.shopify.com/s/files/1/0436/0772/0094/files/19160697625.pdf
    • https://cdn.shopify.com/s/files/1/0431/7321/6411/files/belexerafotofiroseralan.pdf
    • https://cdn.shopify.com/s/files/1/0437/5507/7781/files/terraria_npc_house_designs.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_off000073d5.bin
5e795e1dae448def42ee439955ef60df4e1a2091fca6294a92db63a16e6aca6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73D5 5372 bytes
font_01_sfnt_off00008615.bin
78877de034100564caeb877a195ba5079ed77cbcd0c24b47f52777fec830753e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8615 10932 bytes

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