Malicious PDF — malware analysis report

Static analysis result for SHA-256 37795c91eb0acbc1…

MALICIOUS

PDF

32.1 KB Created: 2020-08-06 21:43:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d6a9679e1d8bcc4ff33b9ac2dad03c0 SHA-1: 23566a42be0c098a9fc70dba8d5ac2c26a4a0131 SHA-256: 37795c91eb0acbc1ce7870bea65d06955f57249f77ed8556ed5f23cac2206f38
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm, which redirect to malicious infrastructure. The primary redirector URL is https://ttraff.ru/pify?keyword=sears+craftsman+radial+arm+saw+manual+pdf. This technique is commonly used to obscure the final malicious destination and evade detection. No scripts were extracted from this sample.

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=sears+craftsman+radial+arm+saw+manual+pdf
    • http://files.authenticbathroomrenovators.com/uploads/1/3/1/4/131410158/xoxewixifoweto.pdf
    • http://files.westchesterwomenssoccer.com/uploads/1/3/2/6/132696030/2231103.pdf
    • http://files.solucionesacabados.com/uploads/1/3/1/4/131483492/7646978.pdf
    • http://files.orangevalleycreations.com/uploads/1/3/1/3/131383510/bujofaketuwomidabej.pdf
    • http://files.pslhsband.com/uploads/1/3/1/4/131407445/kulubosu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0727/0312/files/ayumilove_link_skills.pdf
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/dadekivagusupis.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9354/files/27004697211.pdf
    • https://cdn.shopify.com/s/files/1/0429/1667/5740/files/mivekudature.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pagujusevidunevaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/2381/0211/files/61265022685.pdf
    • https://cdn.shopify.com/s/files/1/0437/0395/9720/files/atlas_of_human_anatomy_latin_terminology_7th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/7503/4524/files/kuderedosajusuga.pdf
    • https://cdn.shopify.com/s/files/1/0429/6753/1673/files/6461781827.pdf
    • https://cdn.shopify.com/s/files/1/0437/9820/0481/files/nefopadeto.pdf
    • https://cdn.shopify.com/s/files/1/0437/2326/0058/files/arches_national_park_trail_map.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_off000042a3.bin
464cb40caba7c4e830a0640d5110aecded64b450fd9c70bd508f0971a8938e62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x42A3 5496 bytes
font_01_sfnt_off00005551.bin
c464cefa86b0e11178462fa9647b02ee5044dbcf4ca65743ef0dd606c2d446d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5551 8812 bytes

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