Malicious PDF — malware analysis report

Static analysis result for SHA-256 b62ee9d1fb35d219…

MALICIOUS

PDF

48.0 KB Created: 2020-07-16 22:02:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29f93a4376077fde13833087785d5e4e SHA-1: 65b249f092142f7871981def0abfc122dc253352 SHA-256: b62ee9d1fb35d219fe2cc29069018c22bc4462ece87fcb4b10b78718a38491f3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector at 'ttraff.com'. The ML classifier strongly indicated maliciousness. The presence of numerous external PDF links suggests a link farm or SEO poisoning attempt to lure users to malicious content. No scripts were extracted, but the PDF structure itself is used for malicious 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/wb?keyword=foundry%20workshop%20pdf
    • http://files.tajaddodorthodontics.com/uploads/1/3/2/7/132712163/3002405.pdf
    • http://files.mwavizi.org/uploads/1/3/0/9/130969735/09ede54.pdf
    • http://files.palos-verdes-gem-and-mineral-society.org/uploads/1/3/0/7/130738823/7880433.pdf
    • http://files.havenhomeindia.org/uploads/1/3/0/9/130969680/luwifamaxa.pdf
    • http://files.mwavizi.org/uploads/1/3/0/9/130969735/09ed
    • https://jikizazona.files.wordpress.com/2020/06/71483696143.pdf
    • https://nozijew.files.wordpress.com/2020/06/85452111710.pdf
    • https://goxexisigela34505480.files.wordpress.com/2020/07/nifajezopugiwu.pdf
    • https://lukipidize.files.wordpress.com/2020/06/50068615002.pdf
    • https://wubolijog.files.wordpress.com/2020/07/77470256360.pdf
    • https://dakuvabab.files.wordpress.com/2020/07/jiburegapabitonuzijib.pdf
    • https://woxuriro.files.wordpress.com/2020/06/nokafotuwatilulamej.pdf
    • https://vugazevilu.files.wordpress.com/2020/07/liwotizi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/78359863479.pdf
    • https://cdn.shopify.com/s/files/1/0434/6042/7928/files/57267987482.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39748763391.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bamizubonofosexewa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zenafepejeviwasi.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/92991378279.pdf
    • https://cdn.shopify.com/s/files/1/0429/6884/2393/files/padiperuwofonixum.pdf
    • https://cdn.shopify.com/s/files/1/0428/8030/3270/files/68103466753.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008066.bin
f0dd1daff5aa5d26891c3973addf56aa22dbe96a927b286d5bb963d5675025ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8066 4736 bytes
font_01_sfnt_off0000907d.bin
a6612d875fdcf8b51682581b712a3d816b072939ba25ddeb779a3f991e03ef38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x907D 10056 bytes

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