Malicious PDF — malware analysis report

Static analysis result for SHA-256 6591a33302a74fd1…

MALICIOUS

PDF

81.8 KB Created: 2020-08-15 12:43:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ae0d020df2909d1fa03252cd8e7ace3 SHA-1: 06eb38c4503ec57d9d29835ffd1a1a3f97485473 SHA-256: 6591a33302a74fd13c7524d6800c5c262908c31460d9d13c269abfafadad2074
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding numerous external links, many of which point to benign Shopify URLs but one critical redirector. The document body, though heavily obfuscated, contains the malicious URL. No scripts were extracted, but the presence of a malicious redirector and link farm suggests an attempt to lure users to malicious infrastructure, likely for further exploitation or phishing.

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.ru/pify?keyword=algebraic+expression+worksheets+8th+grade+pdf
    • http://files.danceconnectionpac.com/uploads/1/3/2/6/132683475/riwuzodetevu-pakevugujazu-lasagurawusun.pdf
    • http://files.excellentwoodturning.com/uploads/1/3/0/8/130814219/94fd1408a2d1d4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7870/4549/files/marvelous_designer_tutorial_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/83803220297.pdf
    • https://cdn.shopify.com/s/files/1/0429/1035/1513/files/bode_diagram_examples.pdf
    • https://cdn.shopify.com/s/files/1/0430/4742/0066/files/samuwixezejezuba.pdf
    • https://cdn.shopify.com/s/files/1/0438/4066/7810/files/who_wrote_voodoo_child.pdf
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/geliwinoza.pdf
    • https://cdn.shopify.com/s/files/1/0436/4589/4816/files/jaxugegarenovowujififu.pdf
    • https://cdn.shopify.com/s/files/1/0440/9065/4885/files/59141309780.pdf
    • https://cdn.shopify.com/s/files/1/0436/3943/9510/files/62416883852.pdf
    • https://cdn.shopify.com/s/files/1/0436/4373/2126/files/36294983486.pdf
    • https://cdn.shopify.com/s/files/1/0435/8782/9928/files/degazinopifox.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_off0000e0fa.bin
7312b8bfceed14bcef516927a00965c01469ea6a1a6107125c49d646b8f4da0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FA 5964 bytes
font_01_sfnt_off0000f54b.bin
fada1d8f1b8f017ecbcc87288185e206c7977e3357c4b6291420b57ceae95f5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF54B 15280 bytes
font_02_sfnt_off000124d5.bin
ccf42771811f3bfcfc4881e0ea26c61020463520b77f542a172ed5d532e4d210		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124D5 16088 bytes

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