Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fa68d48530b8f1e…

MALICIOUS

PDF

67.9 KB Created: 2020-08-09 02:37:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce3ce660854954a02c3a3ddb9aa82737 SHA-1: a684707b78e3131b76a0082328ea8d6fcbbe9d62 SHA-256: 7fa68d48530b8f1eb59a7c5499973711a80acea122551de5eb422f0fc63f179c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm for SEO manipulation or content distribution. One critical heuristic identified a link to known malicious redirector infrastructure at `https://ttraff.ru/pify?keyword=software+architecture+and+design+illuminated+pdf+free+download`. The document body also contains this URL and other Shopify-hosted PDF links, indicating a lure for users searching for specific book titles. No scripts were extracted, but the extensive link farm and the presence of a malicious redirector strongly suggest a malicious intent to drive traffic or potentially distribute further malware.

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=software+architecture+and+design+illuminated+pdf+free+download
    • http://files.martin-hickman.com/uploads/1/3/0/8/130874539/pigubaxubogax_surosaror_mamowu_daxifafo.pdf
    • http://files.anchoragesepticservice.com/uploads/1/3/1/4/131453406/4aaa86ca855e.pdf
    • http://files.childsafefence.com/uploads/1/3/0/8/130874598/9037029.pdf
    • http://files.roamingcic.com/uploads/1/3/2/6/132683087/rejowodobezi-fewibakawugaj.pdf
    • http://files.nagamegallery.com/uploads/1/3/1/6/131606408/5baedfa915bf75.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/1120/1435/files/jevudovorimepof.pdf
    • https://cdn.shopify.com/s/files/1/0437/6746/4085/files/bard_of_blood_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/7530/4612/files/53691899009.pdf
    • https://cdn.shopify.com/s/files/1/0430/7786/1527/files/53632726361.pdf
    • https://cdn.shopify.com/s/files/1/0428/6083/9079/files/34576222644.pdf
    • https://cdn.shopify.com/s/files/1/0433/3810/5000/files/9166955496.pdf
    • https://cdn.shopify.com/s/files/1/0427/8131/1132/files/45290289558.pdf
    • https://cdn.shopify.com/s/files/1/0429/0589/5075/files/35130108593.pdf
    • https://cdn.shopify.com/s/files/1/0431/1144/8729/files/fidiroriro.pdf
    • https://cdn.shopify.com/s/files/1/0427/5362/2182/files/36721386408.pdf
    • https://cdn.shopify.com/s/files/1/0428/5507/1900/files/sleeping_lotus_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0429/7018/5879/files/19145986097.pdf
    • https://cdn.shopify.com/s/files/1/0434/6845/6086/files/33095053913.pdf
    • https://cdn.shopify.com/s/files/1/0432/0890/0768/files/72350199952.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b299.bin
0acf254bda816300c1d22964f08568767cb458249ef2f62f0f9d4fda639ff389		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB299 5764 bytes
font_01_sfnt_off0000c621.bin
b6f27a5f4316f667639f598d4bbe039694e95378decc728804c672ceb0759bce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC621 2408 bytes
font_02_sfnt_off0000d09c.bin
eebba1c1bea27239243677c865b8dc570f0e4e69480044674f2e995c95d1df13		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD09C 15804 bytes

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