Malicious PDF — malware analysis report

Static analysis result for SHA-256 c91318572a2c8470…

MALICIOUS

PDF

55.4 KB Created: 2020-08-12 07:36:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c04557af6de797b616512181ad652e9f SHA-1: ad9a9c5c2da3a94f166f00a8cb122f5869d30c7c SHA-256: c91318572a2c8470b57c322e7cfcc82ef305d7305b7e10de8767fdea0591acff
150 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector at `ttraff.ru`. This suggests the document's primary purpose is to redirect users to malicious infrastructure. The presence of a link farm heuristic further supports this, indicating an attempt to distribute malicious content through a large number of external links. The ML classifier also strongly flagged this PDF as malicious.

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/wb?keyword=present%20perfect%20active%20passive%20pdf
    • http://files.garrettparknurseryschool.org/uploads/1/3/1/4/131406202/9a87a8.pdf
    • http://files.rememberwhenphotos.org/uploads/1/3/1/3/131384638/soroso.pdf
    • http://files.iwstreecare.com/uploads/1/3/2/7/132740479/wogupu-zukokitoruwogog-zikezugufada-pubuzesilas.pdf
    • http://files.skywaterlabradors.com/uploads/1/3/1/3/131384113/8950631.pdf
    • https://cdn.shopify.com/s/files/1/0429/2093/5590/files/76691548939.pdf
    • https://cdn.shopify.com/s/files/1/0435/9120/5021/files/85017452110.pdf
    • https://cdn.shopify.com/s/files/1/0436/2525/0974/files/black_body_radiation_experiment.pdf
    • https://cdn.shopify.com/s/files/1/0429/7749/3146/files/xakopit.pdf
    • https://cdn.shopify.com/s/files/1/0427/4742/9031/files/33531210208.pdf
    • https://cdn.shopify.com/s/files/1/0434/7002/8966/files/lagavifelurufirilipitekas.pdf
    • https://cdn.shopify.com/s/files/1/0433/2440/7961/files/vovijadibesekuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/marifurozijuzaledenikegi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6955/4329/files/54717485972.pdf
    • https://cdn.shopify.com/s/files/1/0435/7813/0593/files/zubavevove.pdf
    • https://cdn.shopify.com/s/files/1/0435/9212/2527/files/44674374587.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_off00007537.bin
182e09dbfee8b62b10cc1e412c07dc218fdc5a55aaa1875d323c9d1d4c31749c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x7537 11752 bytes
font_00_sfnt_off000064bd.bin
18d5f0343da2cff23d4b84f35eed29d5d8bfb722e5fe24450c5fe71170c83778		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64BD 4856 bytes
font_02_sfnt_off0000965f.bin
057c0f5cbac188d92ab61d0714b5bbf60e34668393fdd11db8e50c165a7ff0c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x965F 13876 bytes
font_03_sfnt_off0000c1e9.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1E9 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.