Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b15ca28cb00bbb7…

MALICIOUS

PDF

54.9 KB Created: 2020-08-14 00:49:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a579d3275592d2c2cbe6d4e288e824f7 SHA-1: 69c765dde42347e0327fe10d65a4fc86b5e27754 SHA-256: 6b15ca28cb00bbb70b47e072fb5d7af0309bfabf7e257470c1ac6ced5bba3097
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to external PDF files, a technique often used for SEO manipulation or to distribute malicious content. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely the primary malicious objective. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to direct users 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.com/pify?keyword=bmw+e28+auto+to+manual+swap
    • http://dudasobe.arknaturalintellect.com/uploads/1/3/2/6/132682883/nusowaruse-mesar.pdf
    • http://vumin.jonathandogaming.com/uploads/1/3/1/6/131637254/f13613a.pdf
    • http://files.bartonvillagefestival.com/uploads/1/3/0/7/130775953/8720156.pdf
    • http://bekejup.themaskcaraartist.com/uploads/1/3/0/8/130874153/5576c01a9b706.pdf
    • http://sodez.shidermatology.com/uploads/1/3/0/9/130969082/4206185.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/9148/3031/files/valid_street_addresses.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37357510366.pdf
    • https://cdn.shopify.com/s/files/1/0431/3638/5175/files/jubabibob.pdf
    • https://cdn.shopify.com/s/files/1/0437/5894/4405/files/53958923078.pdf
    • https://cdn.shopify.com/s/files/1/0431/6217/3602/files/pilosiwew.pdf
    • https://cdn.shopify.com/s/files/1/0431/7079/1573/files/22665624440.pdf
    • https://cdn.shopify.com/s/files/1/0430/7940/1632/files/43186484217.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34996744553.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89647405972.pdf
    • https://cdn.shopify.com/s/files/1/0433/5042/5753/files/cornerstone_chords_g.pdf
    • https://cdn.shopify.com/s/files/1/0435/1610/0776/files/ximesite.pdf
    • https://cdn.shopify.com/s/files/1/0432/7974/5192/files/napakekigawerijosaxes.pdf
    • https://cdn.shopify.com/s/files/1/0434/1330/7541/files/archegoniate_book.pdf
    • https://cdn.shopify.com/s/files/1/0438/5941/1094/files/synapse_keyless_x.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_off00008b72.bin
8f40382bee2b0f464fb1f1296b2fc418c1041c1da5e58559aa79d427d40b1552		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B72 5172 bytes
font_01_sfnt_off00009cff.bin
1ff47b3107d110cd083c54f051c0edb1d1b4aecef648c79134216071b8415d92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CFF 10288 bytes
font_02_sfnt_off0000c025.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC025 4324 bytes

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