Malicious PDF — malware analysis report

Static analysis result for SHA-256 06478a0ad9145d36…

MALICIOUS

PDF

37.7 KB Created: 2020-09-11 15:52:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 259beac23af61eb70173f73f1dd829d7 SHA-1: e375cfaa06838597aa52a1e8f6aa7af255ff8305 SHA-256: 06478a0ad9145d3644530583b09c1004543a6b52ecb3bf3b935606666dc64eb4
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one prominent URL leading to a redirector service that is flagged as malicious. The document body, though heavily obfuscated, contains text related to a 'video song' and the malicious URL, suggesting a lure to entice users to click. The presence of numerous other PDF links, many pointing to benign Shopify URLs, indicates a link farm strategy to obscure the malicious destination.

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.me/wix?keyword=banna+badmash+aaya+video+song
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0462/7660/8160/files/alibi_tv_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4087/files/47409577361.pdf
    • https://cdn.shopify.com/s/files/1/0437/6834/8829/files/87293577754.pdf
    • https://static.usrfiles.com/ugd/a2e20a_ee763ce707ab4f83b220c59133e3081c.pdf
    • https://static.usrfiles.com/ugd/b77b08_4af0d3b2b3e447af826f603fb7eb1467.pdf
    • https://cdn.shopify.com/s/files/1/0433/9413/8268/files/gamanufidi.pdf
    • https://cdn.shopify.com/s/files/1/0440/8298/7173/files/skyrim_requiem_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/4975/4519/files/up_board_maths_book_for_class_12.pdf
    • https://cdn.shopify.com/s/files/1/0432/0926/1218/files/vuguxeduwobamalagumurewe.pdf
    • https://cdn.shopify.com/s/files/1/0462/5324/4567/files/term_sheet_l_g.pdf
    • https://cdn.shopify.com/s/files/1/0434/4895/9141/files/kuxusojujere.pdf
    • https://cdn.shopify.com/s/files/1/0431/0011/0999/files/konakexexanuzakamu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000043b3.bin
f266eada42d758ba6640d288e507aabc7295c707a558b215042559679ebcb415
pdf-font-stream PDF embedded font (sfnt) at offset 0x43B3 5172 bytes
font_01_sfnt_off0000551f.bin
cbc46f49120e98aeb7f984c8bc198bdb32c94611614a2d0f7db842db62031068
pdf-font-stream PDF embedded font (sfnt) at offset 0x551F 12456 bytes
font_02_sfnt_off00007c4e.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C4E 4324 bytes