Malicious PDF — malware analysis report

Static analysis result for SHA-256 7586bbdf2c33876c…

MALICIOUS

PDF

48.1 KB Created: 2020-08-24 07:14:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99daad079e04832753166445d093a53a SHA-1: e3ee768988fc7b248a783070d9867d2675c7c36c SHA-256: 7586bbdf2c33876cb1cd01ae6d2f8e0e520d66427dc8c129e742d11d2c1b75b6
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm suggests an attempt to manipulate search engine results or direct users to malicious content. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious lure.

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/pify?keyword=bawli+tared+video+song++hdyaar.+com
    • http://resasaf.eimanelgibreen.com/uploads/1/3/2/6/132681026/lofetudukabuka.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0428/7778/0134/files/mopufoxudaxubabelake.pdf
    • https://cdn.shopify.com/s/files/1/0429/8414/5049/files/wagabufixufefax.pdf
    • https://cdn.shopify.com/s/files/1/0434/0816/2981/files/datewagigimososemige.pdf
    • https://cdn.shopify.com/s/files/1/0432/1479/9012/files/dopikapetixidasanodo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0128/2711/files/integration_of_trigonometric_functions_problems_and_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0430/8546/3713/files/horizontal_and_vertical_axis_wind_turbines.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/wordly_wise_3000_book_6_lesson_11_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0434/2625/0901/files/15953231781.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gomejalubewetilukifij.pdf
    • https://cdn.shopify.com/s/files/1/0437/8879/6053/files/30119245963.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_off00005882.bin
ab8bb2cddf0672b1e5206bb8be4f3609b1b8ef7ab355b317b461864979f6ad5e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5882 5688 bytes
font_01_sfnt_off00006bc8.bin
c66ca33327a438f4e649591b4376fe79a0ef0cc6976677e0574e96e946869000
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC8 15180 bytes
font_02_sfnt_off00009b03.bin
13b358f44c122d43fb5d04283f506b3839776c10af2f8c7c4310c2617b00cc9f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B03 6556 bytes