Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2b2415953051e0d…

MALICIOUS

PDF

59.9 KB Created: 2020-08-03 18:38:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b967fb137ba00054491cd41435b74c1c SHA-1: 3bd1199dd4f58bf06d704108d946abb0c4c6ca3e SHA-256: e2b2415953051e0d6a502f132d42ea87b4b71afaf097e7ef87f5fb45bdba1331
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, 'https://ttraff.cc/pify?keyword=voltage+controlled+oscillator+pdf', is a known malicious redirector. The document body, though heavily obfuscated, also contains this malicious URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.cc/pify?keyword=voltage+controlled+oscillator+pdf
    • http://files.vanessademske.com/uploads/1/3/1/4/131455337/91053acd83d248.pdf
    • http://files.baileykidsmusicals.com/uploads/1/3/1/3/131378776/5383735.pdf
    • http://files.supportedimmersion.com/uploads/1/3/0/8/130813095/zorovidoxafusu.pdf
    • http://files.questbusinesses.com/uploads/1/3/0/7/130740490/bututijoxuzudi-niseponalasa-kajoxizudubejek-pejutiv.pdf
    • http://files.auctionstories.net/uploads/1/3/0/7/130739886/pubagusawevumabuge.pdf
    • https://cdn.shopify.com/s/files/1/0428/2961/1171/files/gamebar_presence_writer.pdf
    • https://cdn.shopify.com/s/files/1/0430/0580/4698/files/zotajufuzi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/tesixorimo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/xepixarevegikuvojomat.pdf
    • https://cdn.shopify.com/s/files/1/0435/4631/2863/files/budamakan.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/14981909947.pdf
    • https://cdn.shopify.com/s/files/1/0430/4093/1991/files/silipilesupugulaninumiwam.pdf
    • https://cdn.shopify.com/s/files/1/0431/0381/3781/files/lajatosaperakuwetukozi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4578/1665/files/98604069132.pdf
    • https://cdn.shopify.com/s/files/1/0429/6769/5523/files/19534994387.pdf
    • https://cdn.shopify.com/s/files/1/0438/1619/0112/files/gigulenik.pdf
    • https://cdn.shopify.com/s/files/1/0441/0834/9592/files/saluxife.pdf
    • https://cdn.shopify.com/s/files/1/0428/2590/8383/files/digoneketupuxagepuxe.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008778.bin
5b9b582f78468052d4c55772de79c8ad190265c2702644a065e622abbb68a9d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8778 5076 bytes
font_01_sfnt_off000098c3.bin
a1ff105e328e018951082276e65c50c005c71f3aa5e41a2363e98e3d33603ad2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98C3 11096 bytes
font_02_sfnt_off0000be9c.bin
713933360072c9d59346590fad668f98c3603c6d2b72ed941ce85481f6af0b74		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE9C 16060 bytes
font_03_sfnt_off0000d32e.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD32E 4324 bytes

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