Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bd3ec1260b0a342…

MALICIOUS

PDF

38.6 KB Created: 2020-08-10 23:05:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54d2c81219594644dac0b6e698d040c4 SHA-1: ce06d16a8ea7baf5d5a5768ad425e6956efde8e7 SHA-256: 8bd3ec1260b0a342605a2bd4843d4c93f9e6400b3995f1aa4197dc338a98c99f
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the URL https://ttraff.cc/pify?keyword=operational+amplifier+with+linear+integrated+circuits+stanley+pdf is part of a known malicious infrastructure. The document body, though heavily obfuscated, also contains this URL, suggesting it is intended to be presented to the user. The presence of a 'PDF_SEO_LINK_FARM' heuristic further supports the malicious intent, indicating the PDF is used to generate traffic to external sites. 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.cc/pify?keyword=operational+amplifier+with+linear+integrated+circuits+stanley+pdf
    • http://files.wiseguyofficial.com/uploads/1/3/0/9/130969545/duxufonizesuzu.pdf
    • http://navoda.alexisangels.net/uploads/1/3/2/8/132815176/fokudozejamune_pitimepuzus_tileko_loxawelimudiri.pdf
    • http://totikote.rycroftlabradors.com/uploads/1/3/1/4/131407995/merog.pdf
    • http://files.whshuskymusic.com/uploads/1/3/1/4/131454733/7243461.pdf
    • http://bijabevaz.therapyinnovations.net/uploads/1/3/2/3/132303189/7696333.pdf
    • https://cdn.shopify.com/s/files/1/0431/0145/4500/files/14551801605.pdf
    • https://cdn.shopify.com/s/files/1/0430/4768/2201/files/modawaki.pdf
    • https://cdn.shopify.com/s/files/1/0432/6542/5570/files/27731508913.pdf
    • https://cdn.shopify.com/s/files/1/0450/4210/6518/files/68994068396.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/74887447642.pdf
    • https://cdn.shopify.com/s/files/1/0432/7214/3001/files/advocates_act_laws_of_kenya.pdf
    • https://cdn.shopify.com/s/files/1/0430/7694/4033/files/pekum.pdf
    • https://cdn.shopify.com/s/files/1/0434/5459/5224/files/61967105273.pdf
    • https://cdn.shopify.com/s/files/1/0435/3448/3616/files/gumubumozafinegopumum.pdf
    • https://cdn.shopify.com/s/files/1/0430/8323/5489/files/vupuwebalor.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/how_to_filter_espn_articles_by_date.pdf
    • https://cdn.shopify.com/s/files/1/0434/1992/6679/files/pevirugezafagunibajaze.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_off0000558a.bin
812c39a9386ee7d59522b9955d39cd6f3ef7b738c16d3e053c6e3e2b2d3bd037
pdf-font-stream PDF embedded font (sfnt) at offset 0x558A 5788 bytes
font_01_sfnt_off00006922.bin
bcfafaf5be8fc033b70bc0f37ebe7146fc0639158e5929a50c02734b4d3252e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6922 10668 bytes