Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c7198fea6c00139…

MALICIOUS

PDF

40.6 KB Created: 2020-08-16 15:40:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e6ff336d265eb785209a7c4a92b0103 SHA-1: 549361d12725b7cb7b0d48a6750d5dcb8b8032bb SHA-256: 1c7198fea6c00139e2c43c1f9de49576c38d7953fccb135d18eac1b7145a418b
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=vidmate+apk+free++for+pc'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The primary intent appears to be redirecting the user to malicious infrastructure.

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=vidmate+apk+free++for+pc
    • http://files.samgolong.com/uploads/1/3/2/8/132815123/dozit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9284441163.pdf?v=1594212706
    • https://cdn.shopify.com/s/files/1/0432/5359/6310/files/53529502133.pdf
    • https://cdn.shopify.com/s/files/1/0437/9744/6813/files/fenipum.pdf
    • https://cdn.shopify.com/s/files/1/0434/2585/7703/files/10450939254.pdf
    • https://cdn.shopify.com/s/files/1/0437/8099/7269/files/11941545961.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/tuzekunapejubowilivipa.pdf
    • https://cdn.shopify.com/s/files/1/0432/9819/3566/files/peweniwejazoxe.pdf
    • https://cdn.shopify.com/s/files/1/0429/8794/6133/files/buxupid.pdf
    • https://cdn.shopify.com/s/files/1/0447/0826/6137/files/calamansi_extract_as_insecticide.pdf
    • https://cdn.shopify.com/s/files/1/0431/8461/9680/files/lorexiromonofo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6717/1223/files/18455338546.pdf
    • https://cdn.shopify.com/s/files/1/0440/9229/3272/files/38695116332.pdf
    • https://cdn.shopify.com/s/files/1/0428/8151/5673/files/duxidujoreroz.pdf
    • https://cdn.shopify.com/s/files/1/0434/5433/3093/files/jivoluxud.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_off00006014.bin
de02eb776517fb19ee97806077d0ed06d05a7bc6aac9e0b2d41bba66af6a9c01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6014 5120 bytes
font_01_sfnt_off00007172.bin
ec5174781fec497a5696f6829df0880be972e46445c2dddacddf5b69ae0ec9fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7172 10660 bytes

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