Malicious PDF — malware analysis report

Static analysis result for SHA-256 aafde13d1d331aae…

MALICIOUS

PDF

41.0 KB Created: 2020-08-15 16:38:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cdc1a816d0caf8dd0190946e9e52e383 SHA-1: 20f51e1860a1a0934453790abcdd706dbc155801 SHA-256: aafde13d1d331aae2e2cf3e2f6fedc6b76724880ae5d65db1c79c0ffdddc1c5f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates a link to known malicious redirector infrastructure at `ttraff.ru`. The document body, though heavily obfuscated, contains the same URL and references to PDF files hosted on Shopify, suggesting a link farm or redirection scheme. The primary intent appears to be directing users to malicious sites through a deceptive link farm.

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=channa+ve+ghar+song+free
    • http://files.isrwaterselfrescue.com/uploads/1/3/1/3/131382721/27637.pdf
    • http://files.midwalestourismawards.co.uk/uploads/1/3/1/6/131636683/3189355.pdf
    • https://cdn.shopify.com/s/files/1/0431/3438/6332/files/84530713334.pdf
    • https://cdn.shopify.com/s/files/1/0433/2827/4582/files/julotuv.pdf
    • https://cdn.shopify.com/s/files/1/0430/0197/0837/files/zatipiwikikasunamenajasak.pdf
    • https://cdn.shopify.com/s/files/1/0448/6260/3426/files/livro_admirvel_mundo_novo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3705/6414/files/41219517425.pdf
    • https://cdn.shopify.com/s/files/1/0431/9900/4827/files/imail_iup_edu.pdf
    • https://cdn.shopify.com/s/files/1/0450/3791/2214/files/cat_s_cradle_vonnegut.pdf
    • https://cdn.shopify.com/s/files/1/0429/3417/3859/files/difference_between_capital_expenditure_and_recurrent_expenditure.pdf
    • https://cdn.shopify.com/s/files/1/0438/5924/7264/files/xuzaduvini.pdf
    • https://cdn.shopify.com/s/files/1/0432/1034/2559/files/riwovonodaj.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000488e.bin
a7bfb0d622b48a55c9df5b7a2416cddbf17633b8b43f12afbff1d1cbe878cfeb
pdf-font-stream PDF embedded font (sfnt) at offset 0x488E 4740 bytes
font_01_sfnt_off000058a1.bin
e1216a61e1cdb002c04ea4e4093c9c7d023d7c1c5b6eb1099f057ebf6404e2aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x58A1 15240 bytes
font_02_sfnt_off00008787.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x8787 4324 bytes