Malicious PDF — malware analysis report

Static analysis result for SHA-256 92ae3c827eb8f6ae…

MALICIOUS

PDF

44.1 KB Created: 2020-08-02 22:01:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b522a4fc24fbf1e1b5aea18f5ea7767 SHA-1: f0d89120e97093d3655ca66d46a9141af12293f3 SHA-256: 92ae3c827eb8f6aeca75ff8779d68032b22d8de1d02d0960994e9e665e445b74
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to a redirector service. The heuristic firings indicate that this is a malicious redirector link farm, designed to lead users to potentially harmful content. The document body itself contains garbled text but also includes the URL https://ttraff.ru/pify?keyword=proximity+sensor+android, which is identified as a malicious redirector.

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.ru/pify?keyword=proximity+sensor+android
    • http://files.heartpieces.net/uploads/1/3/1/3/131379749/3776242.pdf
    • http://files.furkidsboutique.org/uploads/1/3/0/7/130738845/ribebili.pdf
    • http://files.coachminda.com/uploads/1/3/1/4/131406258/sefutukotuzodop_nekukak_folipumafo_wejerutivarum.pdf
    • http://files.distinctdancecenter.com/uploads/1/3/0/7/130739369/visokikowukisu.pdf
    • http://files.cultivacultura.com/uploads/1/3/1/4/131453684/dejusakak-tijixaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/9544/8997/files/jevamebisaduwevanoke.pdf
    • https://cdn.shopify.com/s/files/1/0434/6911/1461/files/form_8379_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0430/7153/7301/files/33238460965.pdf
    • https://cdn.shopify.com/s/files/1/0440/1994/1541/files/26900325699.pdf
    • https://cdn.shopify.com/s/files/1/0429/9885/7891/files/tozanisumapojijowusun.pdf
    • https://cdn.shopify.com/s/files/1/0429/0763/1779/files/41045578118.pdf
    • https://cdn.shopify.com/s/files/1/0439/0954/6136/files/37938452303.pdf
    • https://cdn.shopify.com/s/files/1/0433/2643/9582/files/sujumujusi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5777/3725/files/roleti.pdf
    • https://cdn.shopify.com/s/files/1/0440/6145/8582/files/nokup.pdf
    • https://cdn.shopify.com/s/files/1/0434/0675/3948/files/54466808018.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006611.bin
4568b466961c93424eda9d873144be47796930421857926d64bb1ad5aacc673d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6611 5108 bytes
font_01_sfnt_off00007757.bin
e8def34ef7fa1cd1e737aa53281a1ad4be732a20e453453846aa670fb207f4af
pdf-font-stream PDF embedded font (sfnt) at offset 0x7757 2044 bytes
font_02_sfnt_off000080c4.bin
d04b21058a9ee597721ff78e51bf71e4f49defdd06d0a7179b98afddd9ee58a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x80C4 10128 bytes