Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bc16cfd35fc75d1…

MALICIOUS

PDF

44.3 KB Created: 2020-08-30 23:30:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83363b636cd5e029ca4e4ff0ad779857 SHA-1: 542e48bdbefab53672d60043ffad070abed4bc8c SHA-256: 5bc16cfd35fc75d1a172bfeff851fbd177cc46da8a381fd8b800ddbda07795cf
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous external PDF files, with the primary link leading to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wix?keyword=usb+extreme+ps2+rar', which is flagged as a malicious redirector. This suggests an attempt to direct users to malicious content, likely for phishing or malware distribution.

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=usb+extreme+ps2+rar
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/11f207_581cffbf2e6843d28bb93b19836cad4e.pdf
    • https://static.usrfiles.com/ugd/7198c1_42610fd5c2744c059b098716db878b4b.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4ef48db61934a5e8163bc0ee5d50ce6.pdf
    • https://static.usrfiles.com/ugd/b8c837_27e7badc137c433c9697aaf95c72375f.pdf
    • https://static.usrfiles.com/ugd/b8c837_bffe960db9a440b49904ed44d1a28be5.pdf
    • https://static.usrfiles.com/ugd/b8c837_d7a06a31749b4e9e8983b609aa762230.pdf
    • https://static.usrfiles.com/ugd/b52961_55fa014528934667a0662f2d382dce74.pdf
    • https://static.usrfiles.com/ugd/b8c837_c2931eb0f4b647fc8cead60f5e2cafda.pdf
    • https://static.usrfiles.com/ugd/02beb7_24112b8f2ff94613b965da51e0cb721d.pdf
    • https://static.usrfiles.com/ugd/dc8a8e_77e0be5e404c4c9c82152eb3904874fc.pdf
    • https://cdn.shopify.com/s/files/1/0432/2246/6727/files/konica_minolta_bizhub_185.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/34078282625.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/61539247531.pdf
    • https://cdn.shopify.com/s/files/1/0428/1391/5303/files/lejodakuxogazoderuremofu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39858795743.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_off00006eb8.bin
6e132b6cd38715115b55e74a3bf8d1f49fa00dd507657ee3a903e0816528966a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB8 5264 bytes
font_01_sfnt_off0000808a.bin
e0351ca038622d538f567b90e9ee01546b2dc13f507ed7c2e165776466231791
pdf-font-stream PDF embedded font (sfnt) at offset 0x808A 10500 bytes