Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ff07ca9b4f30ca7…

MALICIOUS

PDF

46.3 KB Created: 2020-08-04 21:28:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08f648902b6c4b24a7d4b36d47734a2d SHA-1: c6eafaa6d74af3c4567e4c33ee25d232c8bfb9d8 SHA-256: 3ff07ca9b4f30ca783394f8832a2760e164f73679d0ed519df874d03ed5aec33
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, many of which are part of a link farm hosted on Shopify. One of the primary URLs, 'https://ttraff.ru/pify?keyword=academic+journal+examples+pdf', is identified as a malicious redirector. This suggests the document is designed to lure users into clicking these links, leading them to malicious infrastructure.

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=academic+journal+examples+pdf
    • http://files.barakakorea.com/uploads/1/3/0/7/130740118/rodamot.pdf
    • http://furidaw.cambridgegirlschoir.com/uploads/1/3/0/7/130739919/f304b2b.pdf
    • http://rumega.laquintonholliday.com/uploads/1/3/2/6/132695306/jekikizi_suxim.pdf
    • http://files.sophiebrenneman.com/uploads/1/3/1/8/131856435/3361361.pdf
    • http://files.artfulbarb.com/uploads/1/3/1/6/131636642/492c8bd77dc.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/fuwupupowuda.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6133/files/mosabuxidarunasopepala.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4702/files/g_eazy_random_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0439/1079/1323/files/zipojupil.pdf
    • https://cdn.shopify.com/s/files/1/0432/3426/3199/files/lusipuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/5771/7152/files/55843084722.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/97878195458.pdf
    • https://cdn.shopify.com/s/files/1/0430/9306/5877/files/mejeboni.pdf
    • https://cdn.shopify.com/s/files/1/0429/5576/7967/files/50941859082.pdf
    • https://cdn.shopify.com/s/files/1/0430/1645/4305/files/91001115465.pdf
    • https://cdn.shopify.com/s/files/1/0432/8721/6293/files/54194223529.pdf
    • https://cdn.shopify.com/s/files/1/0435/7377/2447/files/unity_key_codes.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/5578033559.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mufowotipopugisafe.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_off000077a2.bin
c6e7c29f64262e8d004edfa4ee0efc783fe6a94356fed73a816feea60f473cd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77A2 5432 bytes
font_01_sfnt_off00008a0f.bin
3bc2475a8bcd7178bd813b08ef49c8255fe5ed41a9466c957357aec816275a2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A0F 9980 bytes

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