Malicious PDF — malware analysis report

Static analysis result for SHA-256 0000814db6d59021…

MALICIOUS

PDF

59.5 KB Created: 2020-08-01 04:51:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8450935904e7d098b370073d3f3e3661 SHA-1: 0b2bf0bc29005ca9ddfe29ae1633c57c3f49f577 SHA-256: 0000814db6d59021848d3bfa46a01012c3a63d6ed0aa0491c8a5bfa2f2e107e4
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files, indicating a link farm strategy. One prominent URL, 'https://ttraff.ru/pify?keyword=parkway+drive+songs', is identified as a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body contains garbled text but includes the malicious URL and several Shopify-hosted PDF links.

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=parkway+drive+songs
    • http://files.illinoisskillschools.com/uploads/1/3/0/7/130776370/4887558.pdf
    • http://files.theoreticalbuddhist.com/uploads/1/3/0/9/130969371/zenepewivu_xiziwo_laxorojef.pdf
    • http://files.carlocornelli.com/uploads/1/3/2/6/132681409/433435.pdf
    • http://files.stonehedge.us/uploads/1/3/1/4/131453543/5401787.pdf
    • http://files.flowersbyjennycrafter.com/uploads/1/3/2/3/132302710/9057575.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/4102/9276/files/85307373020.pdf
    • https://cdn.shopify.com/s/files/1/0430/2195/9325/files/39347894618.pdf
    • https://cdn.shopify.com/s/files/1/0432/0080/7074/files/50148469679.pdf
    • https://cdn.shopify.com/s/files/1/0432/8289/0912/files/javascript_array_remove_duplicates.pdf
    • https://cdn.shopify.com/s/files/1/0430/9866/9220/files/gaxinesotureniserorabox.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/jufimasapoperivegebi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/dusajefigurasiga.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40169505762.pdf
    • https://cdn.shopify.com/s/files/1/0432/8656/0936/files/nuvajelirudemekuzafetan.pdf
    • https://cdn.shopify.com/s/files/1/0433/5845/3918/files/95534893243.pdf
    • https://cdn.shopify.com/s/files/1/0432/2879/0946/files/tuvirateguno.pdf
    • https://cdn.shopify.com/s/files/1/0431/3258/4098/files/muvetu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009c60.bin
f18f8fd737756c85345559aa393f74df2ec0d482be757abdf43eb11a80969e02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C60 5280 bytes
font_01_sfnt_off0000ae85.bin
0e04c553f3bb7a139413cdfc30a819c9478d9d2eff8b55e97353c64b1ac2e200		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE85 16364 bytes

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