Malicious PDF — malware analysis report

Static analysis result for SHA-256 a124ff63d38116b0…

MALICIOUS

PDF

55.9 KB Created: 2020-08-04 14:41:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8bbce3978e59cd8d5e54c42e949206c SHA-1: e1be69be44e025a5d7bf21522849689301062240 SHA-256: a124ff63d38116b0587d634ae297170cae786138e1143412fc5ff56f46e71bcf
152 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one pointing to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, includes the text "Direct selling strategy pdf" and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to 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.com/pify?keyword=direct+selling+strategy+pdf
    • http://deliw.gallery-lesmemoiresdejacqmotte.com/uploads/1/3/1/0/131070872/tezitosa.pdf
    • http://files.trinityparktalent.com/uploads/1/3/1/6/131606331/rofisa.pdf
    • http://lokam.shannoncooney.site/uploads/1/3/0/7/130738731/suxoma.pdf
    • http://files.pchany.org/uploads/1/3/2/7/132712116/d9add22c.pdf
    • https://cdn.shopify.com/s/files/1/0430/7389/6602/files/kerbal_space_program_orbit.pdf
    • https://cdn.shopify.com/s/files/1/0431/4900/0864/files/55517746519.pdf
    • https://cdn.shopify.com/s/files/1/0430/9552/3485/files/befatawigizidawutizukibos.pdf
    • https://cdn.shopify.com/s/files/1/0439/9369/4366/files/72245387573.pdf
    • https://cdn.shopify.com/s/files/1/0434/5282/5767/files/81273214507.pdf
    • https://cdn.shopify.com/s/files/1/0439/4447/6840/files/tokosadopidulitepuke.pdf
    • https://cdn.shopify.com/s/files/1/0431/1243/1778/files/soxudekenasalibamas.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/duzexuwodugi.pdf
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/mipexegidowik.pdf
    • https://cdn.shopify.com/s/files/1/0432/2590/7368/files/devil_may_cry_5_trainer.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7880/files/pogowuxabiwawudo.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_off00009ca5.bin
bf95c00f35ce9d48c47a5a8ea6ed2138d4b11d3b3b7e306ed2295c53a42df472
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CA5 5424 bytes
font_01_sfnt_off0000af39.bin
0e79692b46268935404f24d9ca70f5b5e65b847e5bf6f701c443c0295f502645
pdf-font-stream PDF embedded font (sfnt) at offset 0xAF39 10500 bytes