Malicious PDF — malware analysis report

Static analysis result for SHA-256 fad2e87ce9b726a6…

MALICIOUS

PDF

50.6 KB Created: 2020-08-27 17:19:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e24d1ce3fd26409729d02bb0cf09626d SHA-1: 9d49153b8ba466b36c137f3a114d2cdc9045941d SHA-256: fad2e87ce9b726a6cf608ba043aa97ad0dfe901dd9ce094886b0809b0befbe57
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded URLs, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains text related to downloads and includes the malicious URL, suggesting a lure to trick users into clicking malicious links. The presence of numerous external links points towards a link farm or SEO poisoning attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=samsun+davul+zurnal%25C4%25B1+oyun+havalar%25C4%25B1+indir
    • http://files.breathingspacecounsellingpractice.com/uploads/1/3/0/9/130969580/rururinotinoro.pdf
    • http://files.pumpkinandsprout.co.uk/uploads/1/3/1/6/131636725/valujizidonajil-lafisod.pdf
    • http://files.emsot.co.uk/uploads/1/3/0/7/130775916/9850473.pdf
    • http://files.bechtandson.net/uploads/1/3/1/8/131856186/kanitivasutevada.pdf
    • https://cdn.shopify.com/s/files/1/0464/3264/9368/files/its_my_life_mp3_download_pagalworld.pdf
    • https://cdn.shopify.com/s/files/1/0433/3459/8809/files/reluritumirogonukawetoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/3860/5461/files/30375156299.pdf
    • https://cdn.shopify.com/s/files/1/0437/4567/3377/files/nonoroserag.pdf
    • https://cdn.shopify.com/s/files/1/0435/3500/7893/files/67802019039.pdf
    • https://cdn.shopify.com/s/files/1/0434/1055/5041/files/12596937712.pdf
    • https://cdn.shopify.com/s/files/1/0435/1010/4228/files/gajutaxaxapofuvotogika.pdf
    • https://cdn.shopify.com/s/files/1/0428/5631/7091/files/gadozixuniperefinuda.pdf
    • https://cdn.shopify.com/s/files/1/0433/5783/1336/files/ruzagupilikaxone.pdf
    • https://cdn.shopify.com/s/files/1/0429/5265/5002/files/wejisebi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/xanesunewanutegojivulifuv.pdf
    • https://cdn.shopify.com/s/files/1/0435/3772/7637/files/10220753592.pdf
    • https://cdn.shopify.com/s/files/1/0431/4906/6394/files/translating_word_problems_into_algebraic_expressions_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/5322/7936/files/dipebaxir.pdf
    • https://cdn.shopify.com/s/files/1/0430/6658/9335/files/76426211658.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f71.bin
048fb1891f432488516cd811e7b04d68e7d39e548ca3495625137f8fb0c23ff4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F71 6744 bytes
font_01_sfnt_off00006025.bin
080523b93cb10917511bb9d0d532e034ae221660043f2e1f0d51861c3039aa59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6025 2884 bytes
font_02_sfnt_off00006a63.bin
856db5b0c7556002c8ee307dbf38d2519eac5abfccba0724efe1e67b5194340e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A63 5412 bytes
font_03_sfnt_off00007caf.bin
18257b0027a9cedbb639cf8d2e1c5e30765c48c252e277da8c2a4d6f3b27a303		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CAF 12388 bytes
font_04_sfnt_off0000a306.bin
7535ba310d5e970b0522440c13e00d93c4d3934b39904c2679a10be9b7bdcc31		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA306 16628 bytes

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