Malicious PDF — malware analysis report

Static analysis result for SHA-256 b573b3a1a08c4bee…

MALICIOUS

PDF

40.8 KB Created: 2020-08-22 14:46:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a29badeb8c3a5e73920ca192498f877c SHA-1: 6c7fea1190aaccda5fd9d80e9a90e6a8c53cf46f SHA-256: b573b3a1a08c4beea294ad02edf0d56a3217a095729e91495b86c91aa74b42fd
150 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, with numerous embedded URLs. One of these URLs, 'https://ttraff.ru/pify?keyword=frozen+mixed+berries+nutrition+information', is identified as a malicious redirector. The presence of a large number of external links, many hosted on Shopify, suggests an attempt to manipulate search engine rankings or distribute malicious content through a seemingly benign document.

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.ru/pify?keyword=frozen+mixed+berries+nutrition+information
    • http://files.pro-mx.com/uploads/1/3/0/9/130969656/8478804.pdf
    • http://files.kingdommassage.net/uploads/1/3/1/4/131407178/bisini_sebib_xopugoxedega.pdf
    • http://files.btplacoe.com/uploads/1/3/0/8/130873995/066858a5842f7cd.pdf
    • https://cdn.shopify.com/s/files/1/0434/0868/7269/files/59121428427.pdf
    • https://cdn.shopify.com/s/files/1/0434/7022/5574/files/extra_wide_king_size_bed_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0439/7383/6958/files/bootstrapping_in_r.pdf
    • https://cdn.shopify.com/s/files/1/0437/6811/9448/files/elf_oil_blotting_sheets_review.pdf
    • https://cdn.shopify.com/s/files/1/0430/9961/9492/files/binukuposunu.pdf
    • https://cdn.shopify.com/s/files/1/0428/4550/3655/files/new_year_photo_frames_2016.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/wumadezef.pdf
    • https://cdn.shopify.com/s/files/1/0435/8553/6159/files/psak_akuntansi_syariah.pdf
    • https://cdn.shopify.com/s/files/1/0431/2471/9773/files/momiluxivuginorov.pdf
    • https://cdn.shopify.com/s/files/1/0430/8123/6634/files/7130061626.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053d4.bin
6a2b161a5ba3c056092e1dfeefe47746eea7509b6504cfb45a38f3bad2d4dc7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53D4 5116 bytes
font_01_sfnt_off00006522.bin
f761f810455b027b586be59ae97e41d2c29b4f3bdcd3f1845a7c3b6f4345a1ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6522 10264 bytes
font_02_sfnt_off00008834.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8834 4324 bytes

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