Malicious PDF — malware analysis report

Static analysis result for SHA-256 07a84fff976c3630…

MALICIOUS

PDF

45.0 KB Created: 2020-08-08 22:14:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f6016f5929f959bf7ed843f5d763d63 SHA-1: 4e4805cd5a22d07fe078b1ca77f0e31e53511e2c SHA-256: 07a84fff976c36301fcd5797fdfbb815c0739dc71606deacdd58ab8bd2dd15dc
154 Risk Score

Malware Insights

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

This PDF document is classified as malicious due to its extensive use of external links, masquerading as content about 'interior angles of a triangle'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links (30) pointing to external PDFs, likely for SEO manipulation or to distribute further malicious content. One of these links, 'https://ttraff.com/pify?keyword=interior+angles+of+a+triangle+pdf', is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to potentially harmful sites.

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/pify?keyword=interior+angles+of+a+triangle+pdf
    • http://files.trueembodiment.com/uploads/1/3/0/9/130969300/7937817.pdf
    • http://files.agriculturallandservices.com/uploads/1/3/1/4/131455475/5791440.pdf
    • http://files.smokyridgecoffee.com/uploads/1/3/2/3/132302824/wizawawesu.pdf
    • http://files.saujs.co.za/uploads/1/3/2/6/132681824/8694376.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/5866/7430/files/dovekavuxekoxugok.pdf
    • https://cdn.shopify.com/s/files/1/0428/5654/6467/files/6477166024.pdf
    • https://cdn.shopify.com/s/files/1/0430/5934/7618/files/48292500155.pdf
    • https://cdn.shopify.com/s/files/1/0436/9501/4056/files/english_grammar_test_intermediate_level.pdf
    • https://cdn.shopify.com/s/files/1/0438/9994/5112/files/english_word_search.pdf
    • https://cdn.shopify.com/s/files/1/0437/6051/7271/files/depresion_alcoholismo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/xutulagar.pdf
    • https://cdn.shopify.com/s/files/1/0431/4349/5841/files/zoxebisabitekano.pdf
    • https://cdn.shopify.com/s/files/1/0429/5327/7603/files/the_almanac_of_american_politics_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/0985/8984/files/binerezaxopepasivel.pdf
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/gogixilifuxijewub.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_off0000667f.bin
9e4ddb5e5b3b9affa8f9be94bf2a44d6a05ae185dc96ca91cf3e8a94d157863c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x667F 4936 bytes
font_01_sfnt_off00007749.bin
4f1fb4eb046cf8472fec5d5e57de7dcc950da961b05499a042f07c63f74ee989		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7749 9928 bytes
font_02_sfnt_off00009938.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9938 4324 bytes

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