Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c9dd87c680587ea…

MALICIOUS

PDF

86.4 KB Created: 2020-08-06 11:49:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d8d221c2acf8675d1fe3a19885c7fde SHA-1: c602ad9c7d128c383fb54756c56abd0a720df7f8 SHA-256: 0c9dd87c680587eafe3bc5d47b706d63b291a8d988341d9dcd78e6ef58a7b268
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=boundary+layer+thickness+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The presence of many other PDF links, some benign and some unknown, indicates a link farm strategy to obscure the malicious destination. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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=boundary+layer+thickness+pdf
    • http://sener.gregadamsart.com/uploads/1/3/2/7/132712358/5163429.pdf
    • http://files.samuelartist.com/uploads/1/3/1/0/131070331/sigevilis.pdf
    • http://files.neverthirstagain.co.uk/uploads/1/3/1/4/131482976/dodazipodi-jaxopabenu.pdf
    • http://files.dancebykris.com/uploads/1/3/2/6/132682758/da9b0c631aa8c.pdf
    • http://files.huwhatwear.com/uploads/1/3/0/7/130776490/natevowuzuripix-bufibovevi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mafimovudowejiner.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60233972239.pdf
    • https://cdn.shopify.com/s/files/1/0429/4639/6326/files/19450214238.pdf
    • https://cdn.shopify.com/s/files/1/0430/5240/0789/files/hard_disk_sentinel.pdf
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/powovemexuwuwukolutuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/valid_addresses_in_usa.pdf
    • https://cdn.shopify.com/s/files/1/0428/5438/3782/files/95423028457.pdf
    • https://cdn.shopify.com/s/files/1/0433/0727/0297/files/gajinokemesuwivitis.pdf
    • https://cdn.shopify.com/s/files/1/0440/4350/1733/files/wojupemakora.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/45627655382.pdf
    • https://cdn.shopify.com/s/files/1/0428/5412/1635/files/31331781605.pdf
    • https://cdn.shopify.com/s/files/1/0432/3042/9346/files/72731607004.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de4b.bin
084861947ee0f9f14fb1da527bf9f27f53b314cf2b348f89b8a0866aa4506fbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE4B 5340 bytes
font_01_sfnt_off0000f076.bin
838a92aad90f143a020bd0ffe22b8d40e5d1d4b116d05003c5d72feb50047623		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF076 17748 bytes
font_02_sfnt_off000128a1.bin
da133098c8ec00180ce5fe37c74b807b143adc5860869a2f7b6211e455203b10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128A1 16112 bytes
font_03_sfnt_off00013d71.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D71 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.