Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ec6d243c650feb7…

MALICIOUS

PDF

43.4 KB Created: 2020-09-16 21:40:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 008f560bf23cc55b42baa6d01b86599d SHA-1: 345a3a3c544840769907c3544f99a124844c0a2f SHA-256: 9ec6d243c650feb795341cb44661e675c017c1ee7f426ea93f617ee6ca7dd840
150 Risk Score

Malware Insights

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

The PDF contains a prominent link disguised as a book download, which redirects to a malicious URL. This URL is part of a link farm designed to host numerous other PDF files, likely for SEO poisoning or to distribute further malware. The ML classifier strongly indicates maliciousness, and the PDF structure is consistent with a lure for malicious downloads.

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.club/wix?keyword=inventing+arguments+4th+edition+pdf+download
    • http://files.norsegodsasatru.net/uploads/1/3/0/7/130740249/wejezi-kozizawulalova.pdf
    • http://files.jeebdesignfishers.com/uploads/1/3/0/7/130775987/puwafej.pdf
    • http://xituz.littlelifecorner.com/uploads/1/3/2/8/132816066/biwuvaso-naguzo.pdf
    • http://zejitow.rivernationxc.com/uploads/1/3/0/8/130874330/virogaxobibog.pdf
    • http://files.markpacoe.com/uploads/1/3/1/3/131382497/baluditokitap-xadidozab-tagamaviwaf.pdf
    • http://dawuxejop.tavisdupreez.com/uploads/1/3/1/4/131438304/migakiwutekufalawez.pdf
    • http://files.dakotadesigns.net/uploads/1/3/0/7/130740493/jilakeveluked_nerewezidijabuf_zirite.pdf
    • https://a9670a05-2a27-4618-a4ba-492436fd20b7.filesusr.com/ugd/544e7e_e52b9d0bb4c046de8e499b3fbb62928d.pdf?index=true
    • https://f32f1de8-35cc-40f1-b61a-cb433e41b19e.filesusr.com/ugd/003b86_7a1fc05a893f45338fb4708546905e01.pdf?index=true
    • https://1e03311a-72f7-486f-a174-27e418b01595.filesusr.com/ugd/61b8bf_01e621fb38d04afbb76430d9f32a3b4d.pdf?index=true
    • https://a86ff28d-c01a-4543-900c-21f02f02fa54.filesusr.com/ugd/3d514e_b73b4dd0ef8f41e682b30b4d6cee9bcc.pdf?index=true
    • 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_off000062ff.bin
b66eccb3a140ba7dbb7e68678d1ea97dc8a0703324267b44c3bd9b6f1cae281f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62FF 5632 bytes
font_01_sfnt_off00007620.bin
259716706cde3913104a3e102813aff93d5b5d5df625514ddbc2143811156b1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7620 12508 bytes

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