Malicious PDF — malware analysis report

Static analysis result for SHA-256 704770a656e540d5…

MALICIOUS

PDF

32.2 KB Created: 2020-09-01 21:24:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5bafbfd4784682743648799fa98e8223 SHA-1: 13f62b7e54244304febe50265e6cae2c71aa1ffd SHA-256: 704770a656e540d562dfd9f453a4085ebaf770adeb4f0566f9358ee53dbf3518
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a movie, likely to entice clicks. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector.

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=bairagi+movie+all+song
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/6116da_2fb5b7ac152241ccac46b97db892bf57.pdf
    • https://static.usrfiles.com/ugd/0511f5_ccb95d714f2c45158819c39d299aac2f.pdf
    • https://static.usrfiles.com/ugd/2813e2_7acc6716b44c45d1b804756913bf9693.pdf
    • https://static.usrfiles.com/ugd/b8c837_e90bf73675f04c30b8fc7ed03ca40738.pdf
    • https://static.usrfiles.com/ugd/accd1f_a460e9f4e6f14bafa18895b35eab65f1.pdf
    • https://cdn.shopify.com/s/files/1/0431/1855/9393/files/vasoz.pdf
    • https://cdn.shopify.com/s/files/1/0437/3849/7185/files/86336105702.pdf
    • https://static.usrfiles.com/ugd/b8c837_fd95d354f52045b6937cb42309b17429.pdf
    • https://static.usrfiles.com/ugd/6290de_883bebd33ea14378833ffc8770f24d7b.pdf
    • https://static.usrfiles.com/ugd/e3c460_66122e2730a8406abd85c84bfb87e095.pdf
    • https://static.usrfiles.com/ugd/b8c837_411ac86cb72845088f6f82335e195277.pdf
    • https://static.usrfiles.com/ugd/cc03df_9b76185449ba451d8d38e67f38faea24.pdf
    • https://static.usrfiles.com/ugd/bca722_db02c4bbb82b4214935cda63bd11a5b0.pdf
    • https://static.usrfiles.com/ugd/2e16aa_25bb5e2414b74837bdbe3390d3d35076.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_off0000422c.bin
6d94312a51519e50b0d4180644db681a2b1f9811e84d6aab524170e11e71611c
pdf-font-stream PDF embedded font (sfnt) at offset 0x422C 5112 bytes
font_01_sfnt_off00005383.bin
62704bfbb7d11a9cd7253d8d9e73e8b697da795082c40c9e2552a1d8225c7e64
pdf-font-stream PDF embedded font (sfnt) at offset 0x5383 9612 bytes