Malicious PDF — malware analysis report

Static analysis result for SHA-256 92f18b115af392bb…

MALICIOUS

PDF

52.4 KB Created: 2020-08-06 08:15:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d660640e479d69b602317b8ccb5e440 SHA-1: 159002d040157d8d1f70641a989220b4ac527b60 SHA-256: 92f18b115af392bb1fa4444c286493180e21f3eed6d6c630f068915a57d109da
150 Risk Score

Malware Insights

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

The PDF document was flagged as malicious due to its inclusion of a link farm pointing to a known malicious redirector. The document body contains obfuscated text and multiple URLs, including the primary malicious redirector URL. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically identifies the threat, and the ML_NYX_PDF_MALICIOUS model strongly supports this classification. The primary purpose appears to be directing users to malicious content via the ttraff.com domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.
  • 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=fybsc+botany+textbook+pdf
    • http://wikuwep.heatherleephoto.com/uploads/1/3/2/6/132681670/1e09e8034f2e2b8.pdf
    • http://files.paintrollersplus.net/uploads/1/3/1/4/131406892/7564200.pdf
    • http://files.ansonexresources.com/uploads/1/3/0/7/130776499/bokipug_mugiwe_zewezuxo.pdf
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/kuregolaboduwabetugutub.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53940500656.pdf
    • https://cdn.shopify.com/s/files/1/0437/5959/9765/files/51575487268.pdf
    • https://cdn.shopify.com/s/files/1/0432/2613/6743/files/jujuvakosupudope.pdf
    • https://cdn.shopify.com/s/files/1/0427/7485/5846/files/41983698632.pdf
    • https://cdn.shopify.com/s/files/1/0428/7250/4483/files/68115545637.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/story_elements_worksheet_grade_2.pdf
    • https://cdn.shopify.com/s/files/1/0431/6938/2568/files/classical_approach_to_management.pdf
    • https://cdn.shopify.com/s/files/1/0427/8750/4294/files/basic_accounting_cycle.pdf
    • https://cdn.shopify.com/s/files/1/0430/9617/8845/files/nimuwesulodevazeg.pdf
    • https://cdn.shopify.com/s/files/1/0429/9715/3943/files/fidotok.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f6c.bin
ebbb6011bf88dd7872aa4306fd59b670a8262f8617f3dc74dc3189c98303cc2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F6C 5352 bytes
font_01_sfnt_off000071c6.bin
a0f5a8dfeaa0bb6dc0effbaf73f2996d6fa971a09dbb121d521afc971fdcd47e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71C6 3204 bytes
font_02_sfnt_off00007eb9.bin
5e067315a2bd9524b6254977960f062bb129990ed69868068e29b4596197f3c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EB9 2320 bytes
font_03_sfnt_off0000890c.bin
391bb3418555f73898444c9d6b23de89f02a6b36e5ddbd38c3ccba962774c224		 pdf-font-stream PDF embedded font (sfnt) at offset 0x890C 11464 bytes
font_04_sfnt_off0000ae8c.bin
a349519ccbdbca3d75704c2becf615ab37801eb1543272228454131dceb83acc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE8C 16224 bytes

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