Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b55677c9373386e…

MALICIOUS

PDF

45.0 KB Created: 2020-09-07 21:16:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00e7880a2063b6099e0bda452ee2d0cf SHA-1: 0015e5d2327b5323f86587dc82e927bcc542b810 SHA-256: 5b55677c9373386e1fd3485e24f2e6b2b7e1189c36179a2c0fb59c4219b2cb1d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Bunty aur Babli ming'. The presence of numerous external PDF links, many pointing to benign content, suggests a link farm or SEO poisoning attempt to mask the malicious redirector. The ML classifier also strongly indicated maliciousness.

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.link/pify?keyword=bunty+aur+babli+ming
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/dfb5f8_0daa67deb4204e6294c09c2dc4dd18e1.pdf
    • https://static.usrfiles.com/ugd/8e6e76_ce3a4d95331b4541828af8aa4c75c353.pdf
    • https://static.usrfiles.com/ugd/762c1a_039ce7b583e643bf9cf1589db950db4b.pdf
    • https://static.usrfiles.com/ugd/724bd4_7fe4289ffc2746208404e7bf09fb47c3.pdf
    • https://static.usrfiles.com/ugd/8b49c6_9ed620cc979d48c79b2c695748aea143.pdf
    • https://static.usrfiles.com/ugd/9f69bd_d2f538878d35408e9d0dd86e2aa0114c.pdf
    • https://static.usrfiles.com/ugd/b73feb_d9c8942a49f24feba07d5ca9e67cf31e.pdf
    • https://static.usrfiles.com/ugd/0e2875_4b439f1082244a4ba2abf3b154bf783b.pdf
    • https://static.usrfiles.com/ugd/3615fb_4ec105ce8b77451990eab1f1c869ee5e.pdf
    • https://cdn.shopify.com/s/files/1/0435/1252/9055/files/akdam_bakdam_video_song_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/lunukawu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8491/4583/files/86642926929.pdf
    • https://cdn.shopify.com/s/files/1/0431/2432/6564/files/lista_de_canales_totalplay.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_off0000707d.bin
5b99c0f30aaf92e2d04aa5a9d680d0d5774a0728b66fc9db4eca222f66567cf5
pdf-font-stream PDF embedded font (sfnt) at offset 0x707D 5116 bytes
font_01_sfnt_off000081df.bin
222498fecabcb315a93845ff3b44a6d52068b0679c1f55ea6156a366581c416a
pdf-font-stream PDF embedded font (sfnt) at offset 0x81DF 11024 bytes