Malicious PDF — malware analysis report

Static analysis result for SHA-256 80337098ecbf7158…

MALICIOUS

PDF

56.8 KB Created: 2020-08-03 17:12:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34deef329a2c730cc2d98e4f26b009e1 SHA-1: 60d4c3fa3b9e24d92cd62bb7b5b56b2f0700892d SHA-256: 80337098ecbf7158309cec58982242e9eed4612e171433086500000a11f72cce
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL and several other PDF links, suggesting a link farm or phishing attempt.

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.cc/pify?keyword=les+centrales+thermiques+pdf
    • http://files.sandlotolentangy.com/uploads/1/3/0/8/130874015/240afcd7db2.pdf
    • http://tavewap.ajitkaurmaan.com/uploads/1/3/1/4/131453177/e89b6ee95.pdf
    • http://files.chappellskc.com/uploads/1/3/2/7/132710603/raxitesigonebofapuw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9872/5793/files/dufojegedagidipenuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/0581/2633/files/40243743359.pdf
    • https://cdn.shopify.com/s/files/1/0432/6214/8763/files/muderunifakifurupinade.pdf
    • https://cdn.shopify.com/s/files/1/0435/9664/4511/files/runokutinabi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/norejapegorupif.pdf
    • https://cdn.shopify.com/s/files/1/0432/2610/3971/files/gefadikuxumigumavisupopu.pdf
    • https://cdn.shopify.com/s/files/1/0435/0948/1624/files/9175960324.pdf
    • https://cdn.shopify.com/s/files/1/0438/9850/3336/files/jonugubapa.pdf
    • https://cdn.shopify.com/s/files/1/0431/1928/0288/files/54613767703.pdf
    • https://cdn.shopify.com/s/files/1/0427/9622/0572/files/koxabubaxu.pdf
    • https://cdn.shopify.com/s/files/1/0436/6968/4377/files/rokokavubomuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/9374/5046/files/plug_in_baby_tab.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_off00009b4d.bin
de79ce1d168c2e9d1b2d3e2fc9b3a9cfc018226f11f9f466a0e493d2595b30c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B4D 5460 bytes
font_01_sfnt_off0000adb5.bin
21024fae211d6d34219db938a59e0637765fd757d7fac53389d1abf7099a64fb
pdf-font-stream PDF embedded font (sfnt) at offset 0xADB5 12552 bytes