Malicious PDF — malware analysis report

Static analysis result for SHA-256 15fcc316ff7a4083…

MALICIOUS

PDF

57.5 KB Created: 2020-08-29 11:30:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d923c5339346f3cf8ba21bb9e30c2cb3 SHA-1: 0741c0531aad8cbe5e937cc232339942bc50b686 SHA-256: 15fcc316ff7a4083e8df81af435d038ffc70f6bc789f0b91d00bbf89fb280a89
154 Risk Score

Malware Insights

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

The PDF contains a link farm, with one URL identified as a malicious redirector. The document body, though obfuscated, contains the same malicious URL, suggesting the primary purpose is to redirect the user to malicious infrastructure. The presence of multiple links to external PDFs, some of which are benign, is a common tactic to disguise malicious links within a larger, seemingly legitimate collection.

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/wix?keyword=jai+ho+mp3+song+ar+rahman
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7458/3702/files/11086673329.pdf
    • https://cdn.shopify.com/s/files/1/0436/8062/8889/files/star_wars_commander_cheats_no_download.pdf
    • https://cdn.shopify.com/s/files/1/0461/7099/6889/files/specific_heat_and_climate_lab_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66689816557.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d1d4311fb914efbb28328a453795686.pdf
    • https://static.usrfiles.com/ugd/b8c837_f577c71b25d34336a75ae439f6210a03.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a9a94e16e1245bf9f198ea971a5db30.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/23002582469.pdf
    • https://cdn.shopify.com/s/files/1/0435/2793/0011/files/mlb_the_show_19_user_manual.pdf
    • https://static.usrfiles.com/ugd/b8c837_87ff230440ec41aead78420c6236ddc1.pdf
    • https://static.usrfiles.com/ugd/b8c837_d8e06fc5fe7142e8833420b4b276a4ec.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_off00009db9.bin
fbf3b2301067b6011fe2d698634081e6fb018f19dc6e12551b90e7f90260881e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9DB9 5356 bytes
font_01_sfnt_off0000afc9.bin
9867205f4e44c077fbed0b94f02556f505d25eef6372c56ba298d058d087cfd0
pdf-font-stream PDF embedded font (sfnt) at offset 0xAFC9 13108 bytes