Malicious PDF — malware analysis report

Static analysis result for SHA-256 31d5990ce6008d6c…

MALICIOUS

PDF

43.9 KB Created: 2020-07-29 02:28:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45adc7d9bab0075236215f84401b4a24 SHA-1: 0d9e693148279243fa1204dfaa5419073e06be51 SHA-256: 31d5990ce6008d6c71b43864206e12ff274d0b4e971c339ed0b53774b5604254
120 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a malicious redirector and a link farm. The embedded document body, though heavily obfuscated, suggests a lure related to a 'Badger 5 garbage disposal manual'. The primary IOC is a URL pointing to a redirector service, which likely leads to further 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.com/pify?keyword=badger+5+garbage+disposal+manual
    • http://files.carenmadsen.com/uploads/1/3/2/6/132682861/84332f47b3d.pdf
    • http://files.dunsmuirdeerhounds.com/uploads/1/3/1/0/131070450/5819530.pdf
    • http://files.doorkeeperministries.com/uploads/1/3/1/4/131407214/jazisexo.pdf
    • http://files.yukinamua.com/uploads/1/3/2/6/132696154/bf297acac19d.pdf
    • http://files.nlcoopertyres.co.nz/uploads/1/3/0/7/130775528/d8345acb.pdf
    • http://files.yukinamua.com/uploads/1/3/2/6/132696154
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/57189589950.pdf
    • https://cdn.shopify.com/s/files/1/0433/9200/8357/files/gapebovolexed.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3097/files/femekeguwuxugebu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8873/0525/files/jojeragujefamojuro.pdf
    • https://cdn.shopify.com/s/files/1/0433/3800/6687/files/30225465631.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuxovozukirofavekejob.pdf
    • https://cdn.shopify.com/s/files/1/0434/4800/8866/files/rebetaruxegememisuro.pdf
    • https://cdn.shopify.com/s/files/1/0438/2176/0672/files/vemevisin.pdf
    • https://cdn.shopify.com/s/files/1/0434/7628/7648/files/jaleritalegomegopu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8331/7926/files/rulufekiwapemu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3735/0309/files/gezigufovizomir.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4703/files/kurokub.pdf
    • https://cdn.shopify.com/s/files/1/0432/0002/0635/files/fimegimurenuvamulanigako.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_off00006d3e.bin
5f7cce01d7b1727e725d9b598f913a04235b2b79b0cf927143dc5424861a1c21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3E 5396 bytes
font_01_sfnt_off00007f64.bin
d053f4e1c09f4603cc5201dfba9f517f08a726fbe9c0726b1dc0392f7e9e3489		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F64 10344 bytes

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