Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a2112a258c3bc68…

MALICIOUS

PDF

84.1 KB Created: 2020-08-20 06:28:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab47cd50abe86390ce2bba6e40003fc3 SHA-1: ac3c7a6c47e030b726fd0eb90d8460b664356683 SHA-256: 3a2112a258c3bc68812890392c6290dfba76b427ebf4b9870f2d4b04f2c33e53
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, with 28 identified as part of a link farm. One of these links, 'https://ttraff.ru/pify?keyword=transformation+zone+cervix+pictures', is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated and contains the redirector URL, suggesting a lure to malicious infrastructure.

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=transformation+zone+cervix+pictures
    • http://buxofuze.immortalpop.com/uploads/1/3/1/4/131438759/e944d1de.pdf
    • http://files.peoplematteralways.com/uploads/1/3/1/3/131398605/647907.pdf
    • https://cdn.shopify.com/s/files/1/0428/5648/0935/files/sopewikazigobuvudabof.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4823/files/systems_understanding_aid_9th_edition_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0435/8209/5517/files/84659469279.pdf
    • https://cdn.shopify.com/s/files/1/0429/1713/4502/files/91926708407.pdf
    • https://cdn.shopify.com/s/files/1/0430/6249/3345/files/chemistry_test_tube_powerpoint_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/lupuguvem.pdf
    • https://cdn.shopify.com/s/files/1/0435/6666/1800/files/sezutenulofanegonuki.pdf
    • https://cdn.shopify.com/s/files/1/0432/3731/0632/files/vakime.pdf
    • https://cdn.shopify.com/s/files/1/0434/2746/3324/files/lagawaweravaxenajezamidi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0896/6301/files/kilipo.pdf
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/zigujituded.pdf
    • https://cdn.shopify.com/s/files/1/0436/3947/2288/files/headway_beginner_student_s_book_4th_edition.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb8e.bin
eedf4bad6e408802c31efb2a715489831598dd8e020d64db1c2c3943f8a011b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8E 5256 bytes
font_01_sfnt_off0000fd67.bin
c7d14f30764732a1b2e8ca03174cb060b203afb17e07cf679f580576cfa98928		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD67 15244 bytes
font_02_sfnt_off00012d25.bin
7f0fa0b2a0736e515ca4a4c3d4cf404c74862854c22ecb786440192e99b37593		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D25 16276 bytes

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