Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1499c7e545f5080…

MALICIOUS

PDF

57.4 KB Created: 2020-08-12 20:07:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc0d21df1e2a2133377428e32602ea38 SHA-1: f1151097c719004a30b123e1ce0dd48bea9b1901 SHA-256: a1499c7e545f50800fee5dc05a384f1bd1de2f58eebe8d436fe74a4d1ed282dc
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link that is disguised as a document about 'Aptitude topics formulas pdf'. The link leads to 'ttraff.com', which is known for malicious redirection. The document body itself contains obfuscated text and the same malicious URL, reinforcing the lure. The presence of numerous external PDF links, many pointing to Shopify, suggests a link farm for SEO poisoning or traffic generation to the malicious redirector.

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.com/pify?keyword=aptitude+topics+formulas+pdf
    • http://kekozir.spotlightpac.org/uploads/1/3/1/3/131384635/makawemoxek.pdf
    • http://files.sherlockhomesstl.com/uploads/1/3/1/8/131856492/7966491.pdf
    • http://files.quielclass.com/uploads/1/3/2/6/132695200/4beb92fbe218210.pdf
    • http://files.goldensandsresort.ca/uploads/1/3/2/8/132814958/ce3437.pdf
    • https://cdn.shopify.com/s/files/1/0431/8996/0865/files/22549367237.pdf
    • https://cdn.shopify.com/s/files/1/0433/3705/6414/files/night_huntress_syrenne_wowhead.pdf
    • https://cdn.shopify.com/s/files/1/0431/0653/3527/files/jiparoji.pdf
    • https://cdn.shopify.com/s/files/1/0429/6962/8828/files/61500239074.pdf
    • https://cdn.shopify.com/s/files/1/0427/8986/3580/files/atmospheric_water_generator_design.pdf
    • https://cdn.shopify.com/s/files/1/0438/3621/1362/files/agricultural_science_focus_textbook_grade_10_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/2654/4802/files/sulabe.pdf
    • https://cdn.shopify.com/s/files/1/0440/8714/8709/files/zifurelanosodikabiti.pdf
    • https://cdn.shopify.com/s/files/1/0433/0956/4064/files/snake_game_source_code.pdf
    • https://cdn.shopify.com/s/files/1/0432/3577/0535/files/geck_new_vegas.pdf
    • https://cdn.shopify.com/s/files/1/0431/1701/9292/files/81344274979.pdf
    • https://cdn.shopify.com/s/files/1/0432/9809/5272/files/bubelutegizowotuforaw.pdf
    • https://cdn.shopify.com/s/files/1/0429/8126/1466/files/91373305017.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008b4c.bin
62eba5f1415a4d896266a20acc29755c029b7d733dc8223c4ad36cc0e241e656		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B4C 5288 bytes
font_01_sfnt_off00009d26.bin
2d35fe1b112251630f6c3e185fb4bf58c6327cea99f60afab3ca0473214b5b30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D26 2116 bytes
font_02_sfnt_off0000a6f2.bin
442ce93bb01e1ff3a597bb7ee77e7f8f72544393495c7e864ff3847f56e0cc6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6F2 15896 bytes

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