Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e676e112c2968dd…

MALICIOUS

PDF

100.1 KB Created: 2020-08-19 09:57:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da939f3de907942f5bf9e1c3a5bf5234 SHA-1: 8d1bf240aa93790ccca78677ed7fb4e08f4b6580 SHA-256: 2e676e112c2968ddbcf07e514757f9a70d87d610b98a3eb84f5be504336148b2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link that is presented to the user as a 'Bsc maths question paper 2016 pdf'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms that the target URL is associated with malicious redirector infrastructure. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, many hosted on cdn.shopify.com, suggesting a link farm for SEO manipulation or to obscure the final malicious destination. No scripts were extracted from this sample.

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=bsc+maths+question+paper+2016+pdf
    • http://kuwimorew.teacherdallas.com/uploads/1/3/1/8/131871864/9904502.pdf
    • http://files.longbeachrental.ca/uploads/1/3/0/7/130775373/3989e0570268.pdf
    • https://cdn.shopify.com/s/files/1/0429/1356/2787/files/83305743657.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0274/files/57199702490.pdf
    • https://cdn.shopify.com/s/files/1/0434/1940/2405/files/98676032535.pdf
    • https://cdn.shopify.com/s/files/1/0434/7750/0056/files/85767733798.pdf
    • https://cdn.shopify.com/s/files/1/0431/8514/3965/files/98748879274.pdf
    • https://cdn.shopify.com/s/files/1/0437/6766/0706/files/tufolabosuwegorasawuro.pdf
    • https://cdn.shopify.com/s/files/1/0436/5287/4390/files/57289626171.pdf
    • https://cdn.shopify.com/s/files/1/0430/6137/9226/files/88146711458.pdf
    • https://cdn.shopify.com/s/files/1/0438/6832/4005/files/17582571013.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7711/files/suvajasilurabenilin.pdf
    • https://cdn.shopify.com/s/files/1/0437/1926/2357/files/valekoge.pdf
    • https://cdn.shopify.com/s/files/1/0432/6542/5563/files/46166450083.pdf
    • https://cdn.shopify.com/s/files/1/0434/6737/4758/files/89116931620.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_off00012760.bin
ff146fea7dd50e06388b3644fe7eeaa957d8ca2c138554b78ebb628c07bde597		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12760 6020 bytes
font_01_sfnt_off00013bab.bin
ae8a78bb6da86fcf72415db928431c8e567d4086360e661db05cbdb7db43b0e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13BAB 16172 bytes
font_02_sfnt_off00016d17.bin
924dda24734411d6a1d3e468414165a92c1cc0651fb600c633b04ceacb0dd579		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16D17 16384 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.