Malicious PDF — malware analysis report

Static analysis result for SHA-256 7279128f328cd85e…

MALICIOUS

PDF

43.7 KB Created: 2020-09-01 07:17:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 247249f35dd8342a19adacf3fa5ed200 SHA-1: 63d025f625d0bb9a08ba5981179d220578c2fbe2 SHA-256: 7279128f328cd85e3a340df2970fc4d73a89e6b0abf1a7a0b650498721e4fbf1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL and appears to be a link farm designed to improve SEO for dating-related keywords, likely as a lure. 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.com/wix?keyword=best+dating+apps+australia+android
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/02beb7_24d093cd62c94df08f4aca0fd3227353.pdf
    • https://static.usrfiles.com/ugd/b8c837_232f1ba59f154013bfdfcf99f5e48480.pdf
    • https://static.usrfiles.com/ugd/3e5d97_131e7ea88be54b7cbcfd3ee5728a1196.pdf
    • https://static.usrfiles.com/ugd/6290de_42b6339dfa264c6ab99cbc667f06a0bf.pdf
    • https://static.usrfiles.com/ugd/cf79db_f8120d06ec3443e4a015948f490a0d2c.pdf
    • https://cdn.shopify.com/s/files/1/0435/6620/3029/files/cca_in_r.pdf
    • https://cdn.shopify.com/s/files/1/0433/4324/9563/files/dodilewowijimugasen.pdf
    • https://cdn.shopify.com/s/files/1/0436/6240/9881/files/luzoviva.pdf
    • https://cdn.shopify.com/s/files/1/0432/8190/7870/files/schindler_s_list_full_movie_in_480p.pdf
    • https://static.usrfiles.com/ugd/1c8c6c_5325cfe172a548fc8f784fe3a8d616e5.pdf
    • https://static.usrfiles.com/ugd/a4d998_22aaf8387fd84e2c9ba383ac51da96a9.pdf
    • https://static.usrfiles.com/ugd/735189_10eb5df9bfd74543ba3ecccc937d43e5.pdf
    • https://static.usrfiles.com/ugd/8127dd_1405cb009c0049fea07d73f656ac298d.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ba8fa64ff2146f39c01d83a7ed68bbf.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_off00006d3c.bin
47698e348ac0c7376cfb03087ee82f7b9053b8e7e1aad08d017692a4b33e3612
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3C 5176 bytes
font_01_sfnt_off00007ee7.bin
1e794568d5f19476587be4d2c8f325315b999ac82e0041d1292e0ce8ffe9b762
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE7 10092 bytes