Malicious PDF — malware analysis report

Static analysis result for SHA-256 0da55211bce0a5c9…

MALICIOUS

PDF

54.9 KB Created: 2020-08-31 08:26:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd6362d0b3e92f9a86bb8e95de903d1b SHA-1: 9c2e212a3064bec66313b2328701068a7f81c350 SHA-256: 0da55211bce0a5c9f80374858a6f4576c57ed7343763a3b0d272347d1d43cc71
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is flagged as malicious. The document body and heuristics indicate a link farm strategy, likely to disguise malicious downloads as legitimate driver updates. The ML classifier strongly supports the malicious nature of this PDF.

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.me/wix?keyword=tp-+link+ac1300+driver+windows+10
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/1d64af_fcca84d6048a41df9a69832e36fc1aeb.pdf
    • https://static.usrfiles.com/ugd/b8c837_1fdf14fbccdf47169eb3b1d1f1c95a63.pdf
    • https://static.usrfiles.com/ugd/b8c837_d920c46c2f204f7398cc97e4174d14d6.pdf
    • https://static.usrfiles.com/ugd/b8c837_b0ad4987847744cd9d878a83d8b35a12.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a73af7e2b0f4ecca4c2399887728be6.pdf
    • https://static.usrfiles.com/ugd/b8c837_b4a0729e245046edae04b76f9e289909.pdf
    • https://cdn.shopify.com/s/files/1/0436/1535/5042/files/352171533.pdf
    • https://cdn.shopify.com/s/files/1/0430/2775/9257/files/zudobujekuvofebemogetal.pdf
    • https://cdn.shopify.com/s/files/1/0435/9405/5843/files/website_tamil_movie_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/babazibinalamulaxizop.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/55186198914.pdf
    • https://cdn.shopify.com/s/files/1/0430/5590/6970/files/39686004039.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/91494910815.pdf
    • https://cdn.shopify.com/s/files/1/0434/4381/4556/files/80603691079.pdf
    • https://cdn.shopify.com/s/files/1/0427/7154/6279/files/olx_pakistan_app.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_off00006ede.bin
81b83ce7ec23b87f2e84b89da1308237af6fa7eaf886011db36f33eb14e4b634		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EDE 5328 bytes
font_01_sfnt_off0000810f.bin
666914cca36a9f7adbd19d13acf6b9b85997c9c06cf6d617a6b7d96d8f602006		 pdf-font-stream PDF embedded font (sfnt) at offset 0x810F 10716 bytes
font_02_sfnt_off0000a5f1.bin
79f9290ac63674ef86aecb2d026152ad7b55a806ead2c47d3d39297a25c31a07		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5F1 17708 bytes
font_03_sfnt_off0000c015.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC015 4324 bytes

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