Malicious PDF — malware analysis report

Static analysis result for SHA-256 d37e6e426f172277…

MALICIOUS

PDF

50.6 KB Created: 2020-08-12 17:25:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82da05b7ff7b48ddf68e415a9bcba8c6 SHA-1: 5f3dba7894c6deeb45692828ee74f956596a79c5 SHA-256: d37e6e426f17227777d3a0e7edb70a1abb9530f00119c3736677f6d55dce08ec
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=bearing+housing+skf+pdf'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external PDF links, many of which are hosted on Shopify. The document body, though heavily obfuscated, contains the same redirector URL. This suggests the primary intent is to redirect the user to malicious content.

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=bearing+housing+skf+pdf
    • http://mowun.davistennisacademy.com/uploads/1/3/2/8/132814930/539343.pdf
    • http://files.nutrismartworld.com/uploads/1/3/0/7/130776266/8905304.pdf
    • http://desiti.damariscarbaugh.com/uploads/1/3/2/6/132695663/733120.pdf
    • http://lowelir.lawdialogue.in/uploads/1/3/2/6/132696323/xupuwi-mokelitawi.pdf
    • http://files.hightechtintplus.com/uploads/1/3/2/3/132302973/47aff28564.pdf
    • http://lowelir.lawdialogue.in/uploads/1/3/2/6/132696323/xupuw
    • https://cdn.shopify.com/s/files/1/0432/4507/6647/files/79891825099.pdf
    • https://cdn.shopify.com/s/files/1/0431/8609/4248/files/vamavetemorokazutesed.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gotisirifiwixi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/kenmore_gas_range_manual_model_790.pdf
    • https://cdn.shopify.com/s/files/1/0433/6176/3480/files/buxudipafamunewodum.pdf
    • https://cdn.shopify.com/s/files/1/0431/8534/0580/files/37197942847.pdf
    • https://cdn.shopify.com/s/files/1/0428/4124/3814/files/direct_deposit_form_chase.pdf
    • https://cdn.shopify.com/s/files/1/0434/1897/6414/files/39092632202.pdf
    • https://cdn.shopify.com/s/files/1/0437/3974/2369/files/kawukapudojen.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_off000086df.bin
0248c7aa70d4a9529d9f42ae3873fd05a34f64c2e88152503f957a447f31338d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86DF 5384 bytes
font_01_sfnt_off00009925.bin
23c812c460efd19432b5b6ddae75584284b272c69247297af9abdd37047a143c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9925 10668 bytes

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