Malicious PDF — malware analysis report

Static analysis result for SHA-256 06face1c3f4da7d2…

MALICIOUS

PDF

42.0 KB Created: 2020-08-14 13:28:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dacf75098646eddaa4af39f611a8b610 SHA-1: 8a7ce44477541a9b0ef59e6487db73d8bf2bcaff SHA-256: 06face1c3f4da7d21b7520df3dbdecd659d8357c559a87a083f949914e7c5b69
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that lead to a redirector service, which in turn points to a PDF link farm. The document body, though partially corrupted, contains text related to medical guidelines and the malicious URL. This suggests a phishing or scam attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=aha+guidelines+for+subarachnoid+hemorrhage
    • http://dolifev.clubfitnessinspired.com/uploads/1/3/0/7/130776485/rifori.pdf
    • http://files.whsptso.com/uploads/1/3/2/7/132740614/b4a0d28f78cf1.pdf
    • http://files.nahanee.com/uploads/1/3/1/3/131398308/7507643.pdf
    • http://zoguleto.josephhudson.com/uploads/1/3/1/3/131380930/2fce788694dac20.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6042/7928/files/55130742735.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8532/files/jovogazuwese.pdf
    • https://cdn.shopify.com/s/files/1/0437/3214/0186/files/31282989568.pdf
    • https://cdn.shopify.com/s/files/1/0431/8960/0414/files/8630909385.pdf
    • https://cdn.shopify.com/s/files/1/0438/8611/7019/files/48825323232.pdf
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/jujokurarumimusu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7077/4693/files/57122425063.pdf
    • https://cdn.shopify.com/s/files/1/0434/6871/8242/files/petrified_dragon_bone.pdf
    • https://cdn.shopify.com/s/files/1/0428/2250/0518/files/dagikugetigenagejaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/8201/4108/files/31813831586.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065df.bin
3871d07af484aa834d72b7cde333cf1084efa01e827a2afcc6b6d4a6f89a82ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x65DF 5564 bytes
font_01_sfnt_off00007897.bin
1854150db9252115c00747869d34ac7539af7660e1dac96ce07116e79ca55625
pdf-font-stream PDF embedded font (sfnt) at offset 0x7897 10112 bytes