Malicious PDF — malware analysis report

Static analysis result for SHA-256 6baa7d62b75d3477…

MALICIOUS

PDF

51.4 KB Created: 2020-08-15 20:26:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7811c9e775981333d152af7c149dafb1 SHA-1: 17d1865b36ed20d93442e1f7817176d18fea9a9f SHA-256: 6baa7d62b75d3477b52b00ff64271c8563a7013b9b4674a0a56c99350cbab72a
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains the URL and text suggesting a lure related to a 'roti maker manual machine'. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic to obscure the malicious destination. No scripts were extracted, but the ML classifier strongly indicates malicious intent.

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/wb?keyword=roti%20maker%20manual%20machine
    • http://danuso.jadecaryromance.com/uploads/1/3/0/7/130738546/9161552.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/1583/9645/files/angular_6_form_group_example.pdf
    • https://cdn.shopify.com/s/files/1/0435/8547/0627/files/42816035124.pdf
    • https://cdn.shopify.com/s/files/1/0438/6521/1035/files/36414912075.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/download_agricultural_economics_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0435/4991/7347/files/black_and_decker_weed_eater_string.pdf
    • https://cdn.shopify.com/s/files/1/0432/5824/9376/files/39493369621.pdf
    • https://cdn.shopify.com/s/files/1/0437/9767/6192/files/29290785361.pdf
    • https://cdn.shopify.com/s/files/1/0448/0250/6909/files/how_to_delete_playlists_on_youtube.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/94050061459.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9553/files/75419803622.pdf
    • https://cdn.shopify.com/s/files/1/0431/7655/8746/files/32822955959.pdf
    • https://cdn.shopify.com/s/files/1/0431/6741/6488/files/35756868175.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_off00007516.bin
1bb62e1b36f59d078acacfc66509d907cd84ddc7152de281eafe9b49f333f00a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7516 4816 bytes
font_01_sfnt_off00008539.bin
5eae065610f450e16e155860c710570d0186bc6a1fe6f047111ae2df11f87d72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8539 14688 bytes
font_02_sfnt_off0000b25b.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB25B 4324 bytes

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