Malicious PDF — malware analysis report

Static analysis result for SHA-256 75a88ba012d73c5c…

MALICIOUS

PDF

45.9 KB Created: 2020-08-25 08:40:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08d9b8f31601e3c9faa9d6a03ad47740 SHA-1: 9f43b4b179c8b889e06fdf307c2270414e678372 SHA-256: 75a88ba012d73c5cf7147530f44d2588fe3653155699f9c371b0bf143837b553
162 Risk Score

Malware Insights

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

The PDF contains a link to known malicious redirector infrastructure at `https://ttraff.cc/pify?keyword=creature+full+movie++400mb`. It also hosts a large number of external PDF links, many pointing to Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious, and the presence of a download button lure further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=creature+full+movie++400mb
    • http://tomuk.virginianutritionists.org/uploads/1/3/1/3/131383483/duzobilu.pdf
    • http://files.johnwesthaver.com/uploads/1/3/0/8/130874382/fogajajuxapenem_loxafineru_depuda_samitokukifowu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/6991/3753/files/scope_of_work.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/morakemavef.pdf
    • https://cdn.shopify.com/s/files/1/0437/1962/2808/files/all_marketing_concepts.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dubisetebezurazoxodo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7086/6076/files/63699043645.pdf
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/64243265518.pdf
    • https://cdn.shopify.com/s/files/1/0440/5772/3030/files/anyong_tubig_sa_pilipinas.pdf
    • https://cdn.shopify.com/s/files/1/0427/7560/9510/files/gusenulumikinezot.pdf
    • https://cdn.shopify.com/s/files/1/0432/8092/4837/files/20112859801.pdf
    • https://cdn.shopify.com/s/files/1/0432/4674/7805/files/chevy_equinox_2013_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/5945/3860/files/wuxidefival.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dc6.bin
1b6873723e72e5082ddd7d202129df11ce99cf6e97919a60c4e743780fd0b450		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC6 5072 bytes
font_01_sfnt_off00006ef6.bin
f3f4049feaf26ef552a06563baa7faa1832c137e9e18f4582a6eccc1adac9342		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF6 12024 bytes
font_02_sfnt_off00009561.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9561 16164 bytes

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