Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b0b5cbfef2a64fc…

MALICIOUS

PDF

47.1 KB Created: 2020-08-09 06:46:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9993b636b5e8b8d6320b35afeb966881 SHA-1: c090039357c7ab98956a88f889521d08ee172016 SHA-256: 4b0b5cbfef2a64fc6b65d51ae4699c01644137717c728cd72a24779a79e2d71a
150 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing a malicious redirector link and a large number of external PDF links, indicating a link farm. The primary malicious URL identified is https://ttraff.ru/pify?keyword=developing+tactics+for+listening+pdf. The document body contains garbled text and embedded URLs, further supporting the malicious intent of redirecting users to potentially harmful content.

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=developing+tactics+for+listening+pdf
    • http://files.caseagainstfaith.com/uploads/1/3/0/7/130775506/xapuvotekokasap-ganodegagi.pdf
    • http://files.musiciansdreamaid.org/uploads/1/3/0/7/130738722/puxidumefubesi-wisuvonafubik-vopiti-rotonemu.pdf
    • http://files.commsailpistakee.org/uploads/1/3/1/8/131856956/tusuwewubivog.pdf
    • http://files.wyomingbaroque.org/uploads/1/3/1/4/131437246/3798493.pdf
    • https://cdn.shopify.com/s/files/1/0438/3899/6642/files/busonid_32_bula.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/40414878826.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31052941417.pdf
    • https://cdn.shopify.com/s/files/1/0430/2992/1943/files/nudovatamimugepupojiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/6243/5739/files/5715736707.pdf
    • https://cdn.shopify.com/s/files/1/0437/7785/1553/files/61387595600.pdf
    • https://cdn.shopify.com/s/files/1/0429/8611/1137/files/92548357986.pdf
    • https://cdn.shopify.com/s/files/1/0428/3239/6447/files/4320774374.pdf
    • https://cdn.shopify.com/s/files/1/0428/7902/5318/files/previn_trio_oboe_bassoon_piano.pdf
    • https://cdn.shopify.com/s/files/1/0437/7745/8334/files/petty_cash_book_format.pdf
    • https://cdn.shopify.com/s/files/1/0432/3845/7504/files/59953678405.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
stream_005_off00008c86.bin
c665809a246d19fca4cbdf895b23a056789a53bd111af445aa62e1773159f154
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8C86 20888 bytes
font_00_sfnt_off00005739.bin
a7899610b93f1a453ef8c1a42821c9742e4872e6695e275b6dbd7e2abc24e1e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x5739 5384 bytes
font_01_sfnt_off000069aa.bin
1d93fe9fac800f81218754ab4e4ded9789fcd1a0e096ecfe447df4f4cfb608a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x69AA 10116 bytes