Malicious PDF — malware analysis report

Static analysis result for SHA-256 582507a14b9e360f…

MALICIOUS

PDF

53.9 KB Created: 2020-07-29 23:33:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aeb9d7fe1624d738f370e55f3e70203b SHA-1: 5841c7632278af032a2c28fb41f8967a762c6bb9 SHA-256: 582507a14b9e360f1334b9dcd3dceeba24308efdfce655707f9aa9a625744938
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary URL points to a redirector service, and the document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create SEO-optimized content. The presence of a link farm and a malicious redirector indicates an attempt to drive traffic to potentially harmful sites.

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.com/pify?keyword=antimetabolites+mechanism+of+action+pdf
    • http://files.fiveminutechurch.net/uploads/1/3/0/8/130874658/rasobotanukuga.pdf
    • http://files.wakarusaumc.org/uploads/1/3/1/3/131398323/9174e.pdf
    • http://files.motorcyclevagabondshow.com/uploads/1/3/1/4/131454286/4a4626.pdf
    • http://files.nomomani.com/uploads/1/3/1/4/131453136/fepopokozudaga.pdf
    • https://cdn.shopify.com/s/files/1/0430/5109/0071/files/jepululijobetifometeg.pdf
    • https://cdn.shopify.com/s/files/1/0430/7940/1632/files/dilojubudubo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7086/6076/files/47325980177.pdf
    • https://cdn.shopify.com/s/files/1/0430/5872/5018/files/gawovedapo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4162/7029/files/56221053093.pdf
    • https://cdn.shopify.com/s/files/1/0434/0894/9402/files/8805365569.pdf
    • https://cdn.shopify.com/s/files/1/0430/7379/8298/files/64436441535.pdf
    • https://cdn.shopify.com/s/files/1/0438/1288/0544/files/nibejojurotar.pdf
    • https://cdn.shopify.com/s/files/1/0430/8605/3527/files/buduwijurod.pdf
    • https://cdn.shopify.com/s/files/1/0427/8845/4559/files/nogabuxuri.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_off00009544.bin
d0aa0b6a4b4ba5ac07208166f8869a0d3ba0509204cedf1f6283543932f4a49e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9544 5216 bytes
font_01_sfnt_off0000a6c7.bin
db61ba0065c559aab8e2744dd52878b089385c8c4ba2d56152f6dc51c1dba6c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6C7 10404 bytes

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