Malicious PDF — malware analysis report

Static analysis result for SHA-256 f68e1c7362f27188…

MALICIOUS

PDF

39.4 KB Created: 2020-08-23 20:20:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99b7079b7d208a93dbf9f2062aee7ed5 SHA-1: cc203dafd098e62a1a012f6bbac1a39677bb0f60 SHA-256: f68e1c7362f271886c958fd96328b81012fe9e0704f675ad9e6c5072a14d5dc4
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.com. The document body, though heavily obfuscated, contains the same URL. The PDF also exhibits characteristics of a link farm, with numerous embedded links to external PDFs, many hosted on Shopify. The primary malicious URL is used to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=islamic+calendar+2019+pdf+one+page
    • http://megob.astermaintenance.com/uploads/1/3/0/8/130874493/gatekigalerujik.pdf
    • http://files.eisenbergontheroad.com/uploads/1/3/1/1/131164386/43441f.pdf
    • http://files.latitude44yoga.com/uploads/1/3/0/7/130775979/sejajolidafopaza.pdf
    • http://files.sal-elsayed.com/uploads/1/3/2/8/132814980/da039a1ceeb4891.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51108684678.pdf
    • https://cdn.shopify.com/s/files/1/0438/5947/6630/files/fagimupunubowexod.pdf
    • https://cdn.shopify.com/s/files/1/0430/6262/4417/files/ib_biology_textbook_online.pdf
    • https://cdn.shopify.com/s/files/1/0432/7328/9888/files/nabig.pdf
    • https://cdn.shopify.com/s/files/1/0437/3518/7605/files/jewilepapanurixeke.pdf
    • https://cdn.shopify.com/s/files/1/0428/5428/5479/files/stardew_red_cabbage.pdf
    • https://cdn.shopify.com/s/files/1/0435/2484/9815/files/9991266254.pdf
    • https://cdn.shopify.com/s/files/1/0429/3348/5727/files/45284058615.pdf
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/mezijut.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_off00005b0c.bin
99cbfe9729bf35171d477a60252a30eb1aa05278873ff1091d1ecedc1b7baeb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B0C 5896 bytes
font_01_sfnt_off00006efd.bin
0b3d1b6197412c7d0b7e1b868d64f95d283f47f0460c96761e84ac5ebc6e6e06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EFD 9940 bytes

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