Malicious PDF — malware analysis report

Static analysis result for SHA-256 65126e9a3bf68b3f…

MALICIOUS

PDF

58.8 KB Created: 2020-07-27 16:01:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b638c0142f05d27e721e7696051a36b1 SHA-1: ee626e6443d9e74542baa1e452d352c1ac4f404c SHA-256: 65126e9a3bf68b3ff1484b3128a9a0af375d5df1b016befcc0f7227d3a96096a
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying it as a malicious redirector. The primary malicious URL, 'https://ttraff.com/pify?keyword=biglybt+android+tv', is designed to redirect users to potentially harmful content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the PDF structure itself is used to host a link farm.

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=biglybt+android+tv
    • http://files.catyoung.net/uploads/1/3/2/3/132302736/sirumu.pdf
    • http://files.buypolarxtracts.com/uploads/1/3/2/6/132681836/3947574.pdf
    • http://files.willisband.org/uploads/1/3/0/8/130874683/denim-pizorikur-nepupigasetibul.pdf
    • http://files.enfieldover50scommunity.org/uploads/1/3/0/9/130969514/6524080.pdf
    • http://files.iolascott.com/uploads/1/3/1/4/131437822/kavowowebogofulubez.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4430/7098/files/gozowereforagunal.pdf
    • https://cdn.shopify.com/s/files/1/0430/5649/6791/files/zosafozemojima.pdf
    • https://cdn.shopify.com/s/files/1/0434/2956/0481/files/dinexafozawefisegenezawo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8919/9268/files/pojapaxokaxejapo.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/22215389160.pdf
    • https://cdn.shopify.com/s/files/1/0430/4466/7553/files/17749359517.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1097/files/23687737692.pdf
    • https://cdn.shopify.com/s/files/1/0434/9073/8328/files/vefefunedodopulelupimuna.pdf
    • https://cdn.shopify.com/s/files/1/0428/0988/4838/files/85408465013.pdf
    • https://cdn.shopify.com/s/files/1/0427/7560/9510/files/tesexejogokawekarefaromu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fokadexowigexavutezirero.pdf
    • https://cdn.shopify.com/s/files/1/0428/3452/6375/files/68917760954.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_off00007e25.bin
7a10c6b1fa0af28548245893f7d603a15952e6d661b6d6fa684220809649c7a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E25 4836 bytes
font_01_sfnt_off00008e8e.bin
922c47e0ec4f2f735f6b739d39b64ee041b9e46e2eec7850f5ca67717fd54a10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E8E 1952 bytes
font_02_sfnt_off000097ef.bin
4e72e011bb0a6c6ef5da543372469d6c0c6f5d5eb9cab166ed1546cbb4cf31ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97EF 15184 bytes
font_03_sfnt_off0000c74f.bin
eec25c4d6e5c88313fe03ada1d381cd161bf7ad9ce68f8e69f9ca10c06e0010d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC74F 16372 bytes

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