Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb37ca4292e2fd6d…

MALICIOUS

PDF

36.8 KB Created: 2020-07-28 23:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd346e86e28858e52781a411ec2fbcb4 SHA-1: 6bf32aa454cf4433c7a620763d18f62ff72cc219 SHA-256: bb37ca4292e2fd6dfe1b30a3a6f31b00b022758f4d6a81a30957c5bd4fb4af32
170 Risk Score

Malware Insights

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

The PDF file is identified as an image-only lure, typical of phishing attacks. It contains a critical malicious redirector link pointing to ttraff.ru, which likely serves as a gateway to further malicious content. The document also features a link farm, with multiple PDFs hosted on cdn.shopify.com, suggesting an attempt to leverage legitimate platforms for distribution or SEO manipulation. 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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 2 image(s), only 0 text block(s), carries a click-outward action, and is only 36 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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=cessna+172n+parts+manual
    • http://files.waxgalleryechuca.com.au/uploads/1/3/1/4/131484328/929d7f5a7.pdf
    • http://files.coreyrobinsonmusic.com/uploads/1/3/0/7/130738714/bubamamun-rurofulipefol-mugisodof-kinibibimetike.pdf
    • http://files.signsbytran.com/uploads/1/3/0/9/130969340/6780620.pdf
    • http://files.bodybrainexercise.com/uploads/1/3/2/7/132710783/xovanofusibolutar.pdf
    • http://files.emmadean.com/uploads/1/3/1/4/131406800/bc4614.pdf
    • https://cdn.shopify.com/s/files/1/0435/3212/4312/files/zovulozifo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4291/3955/files/37794058822.pdf
    • https://cdn.shopify.com/s/files/1/0434/0642/6275/files/58640739945.pdf
    • https://cdn.shopify.com/s/files/1/0431/6836/6760/files/boravevuwovupovekipago.pdf
    • https://cdn.shopify.com/s/files/1/0433/7526/3909/files/8983577720.pdf
    • https://cdn.shopify.com/s/files/1/0433/4639/5304/files/74151765837.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3288/files/nalaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5962/files/90792084040.pdf
    • https://cdn.shopify.com/s/files/1/0430/5181/0969/files/7497640160.pdf
    • https://cdn.shopify.com/s/files/1/0434/0164/2149/files/24984771044.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/
    • https://cdn.shopify.com/s/files/1/0431/6836/6760/files/borave

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059d6.bin
606fc0f2671617f0c81da63df566915e98de6efe447cb07cc69d2c2736d9575a
pdf-font-stream PDF embedded font (sfnt) at offset 0x59D6 4976 bytes
font_01_sfnt_off00006aae.bin
3a7eea80850ba21f66b64ea600e317b4ba7516b36a5d6e4754236ef5874cc489
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAE 8580 bytes