Malicious PDF — malware analysis report

Static analysis result for SHA-256 222597787d07e947…

MALICIOUS

PDF

41.9 KB Created: 2020-08-09 05:59:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a08aa27ec46b6a4b1e95418a8517abb9 SHA-1: 8e2b1eab2d621c92dcc4755be6bc8420c15e74bf SHA-256: 222597787d07e94747ce5ee6311a8b7d15353fc12af62f3e2cf9bcb68128a32d
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. Another critical heuristic identified a PDF link farm, suggesting an attempt to manipulate search engine results for malicious purposes. The document body, though heavily obfuscated, contains references to 'basic linux commands pdf free download' and the malicious URL, reinforcing the lure. The ML classifier strongly indicates maliciousness.

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.cc/pify?keyword=basic+linux+commands+pdf+free+download
    • http://files.ptoec.org/uploads/1/3/1/8/131856173/67545b7b14.pdf
    • http://wuzisiw.atplaygames.com/uploads/1/3/0/7/130776760/6507550.pdf
    • http://files.bettervoicescoach.com/uploads/1/3/1/3/131380083/junipodibas.pdf
    • https://cdn.shopify.com/s/files/1/0428/5313/8591/files/lalej.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefiwi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6559/6321/files/81995714276.pdf
    • https://cdn.shopify.com/s/files/1/0431/0358/4409/files/65650670510.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gabagijujusudizal.pdf
    • https://cdn.shopify.com/s/files/1/0428/7997/5590/files/96193854645.pdf
    • https://cdn.shopify.com/s/files/1/0428/4134/2108/files/20056456500.pdf
    • https://cdn.shopify.com/s/files/1/0434/0531/2154/files/gajujubazewidina.pdf
    • https://cdn.shopify.com/s/files/1/0433/5380/0859/files/kijenefafo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6587/6378/files/anatomy_for_sculptors.pdf
    • https://cdn.shopify.com/s/files/1/0433/9610/4348/files/xujevejazabenegazek.pdf
    • https://cdn.shopify.com/s/files/1/0436/3884/9696/files/zafigajafovi.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_off000065b1.bin
bbab76109de72059a7746a5bac3d13e01fa5bd610f769555266d160d7b28face		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65B1 5508 bytes
font_01_sfnt_off00007870.bin
f188259a9f49c752443c4e71276a4956b6c3d9647ecd04b36192cb4f968c2d00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7870 10004 bytes

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