Malicious PDF — malware analysis report

Static analysis result for SHA-256 448996dc0cd9271a…

MALICIOUS

PDF

51.5 KB Created: 2020-08-13 22:31:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b41fb7278706b98f1d9c3addf0a043a9 SHA-1: 7a4a1ce6571d95e6df74e5a6da87210ac6f9029c SHA-256: 448996dc0cd9271a5aea8c0d79e98fddf8e0699ff805c148d8fae6ec63fa53fd
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to 'ttraff.ru'. Another critical heuristic, PDF_SEO_LINK_FARM, indicates a mass of external PDF links, with the first identified link being to 'cdn.shopify.com'. The ML classifier also flagged this PDF with high confidence. The document body contains the URL 'https://ttraff.ru/pify?keyword=unicode+to+inpage+software+free' and several shopify URLs, suggesting a lure to external 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.ru/pify?keyword=unicode+to+inpage+software+free
    • http://files.rebeccagrodofsky.com/uploads/1/3/1/4/131438018/7039789.pdf
    • http://files.seedsforthejourney.com/uploads/1/3/1/3/131379306/vokijelikurat.pdf
    • http://files.essexstdental.com/uploads/1/3/1/3/131383754/1073482.pdf
    • http://files.mishablaise.com/uploads/1/3/2/6/132681456/turerokujofunefozela.pdf
    • http://files.empathsandlightbeings.com/uploads/1/3/1/4/131438260/6404035.pdf
    • https://cdn.shopify.com/s/files/1/0438/3696/5026/files/gujixutewo.pdf
    • https://cdn.shopify.com/s/files/1/0453/8272/9896/files/econometric_analysis_greene_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/6116/5723/files/zizobiwusuwusaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/3355/9203/files/96890081952.pdf
    • https://cdn.shopify.com/s/files/1/0436/0034/7299/files/33043685672.pdf
    • https://cdn.shopify.com/s/files/1/0431/4074/3330/files/22197848301.pdf
    • https://cdn.shopify.com/s/files/1/0430/4922/2298/files/naming_acids_and_bases_worksheet_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/6077/2516/files/axis_and_allies_1914_rules.pdf
    • https://cdn.shopify.com/s/files/1/0430/0747/5875/files/busakibefamirepuleb.pdf
    • https://cdn.shopify.com/s/files/1/0446/9882/8954/files/asylum_in_usa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4267/6636/files/25431768999.pdf
    • https://cdn.shopify.com/s/files/1/0434/4263/4917/files/30955691195.pdf
    • https://cdn.shopify.com/s/files/1/0429/4131/7276/files/dokugudodowozefiro.pdf
    • https://cdn.shopify.com/s/files/1/0432/4956/5853/files/dometic_air_conditioners_manual.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00009459.bin
d545a9308917cdf1be9f4187525c6f7770e5724ddf83e03f6acf31787b202c34		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9459 18804 bytes
font_00_sfnt_off00005ad1.bin
c1fe7f61d266297754ade883168b7ecfd0f670738ddd9f95a3e4ae7537bed3eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD1 5160 bytes
font_01_sfnt_off00006c6d.bin
8eac8756eb0815b1a72a695e1a693ca298d1b3a47ff9bfb5d90b133f3683c7e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C6D 12152 bytes
font_03_sfnt_off0000b206.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB206 4324 bytes

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