Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5ae9e7a7c5539df…

MALICIOUS

PDF

47.1 KB Created: 2020-09-01 04:04:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f556390f3f53822eb954d6707596f75b SHA-1: 413c443e09154e9301b1dc1bfba0aca314b4ae7c SHA-256: c5ae9e7a7c5539df74578cc793295807700385035da4500ed35574f8c66f6d5a
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, forming a link farm. One prominent URL, https://ttraff.ru/wix?keyword=2g+3g+4g+frequency+bands+pdf, is flagged as a malicious redirector. This suggests the document is designed to lure users through SEO-poisoned search results or direct links to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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/wix?keyword=2g+3g+4g+frequency+bands+pdf
    • https://cdn.shopify.com/s/files/1/0436/8583/9003/files/2903193928.pdf
    • https://cdn.shopify.com/s/files/1/0464/2550/5944/files/fevime.pdf
    • https://cdn.shopify.com/s/files/1/0434/4306/0901/files/41355072601.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2615/files/serious_sam_3_bfe_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/9059/9319/files/valivipemobubimuxafijil.pdf
    • https://cdn.shopify.com/s/files/1/0429/9600/7065/files/15659943741.pdf
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/megalis_20.pdf
    • https://cdn.shopify.com/s/files/1/0433/4606/7621/files/rasizimizekemawixeronavow.pdf
    • https://cdn.shopify.com/s/files/1/0429/6635/2025/files/69197343756.pdf
    • https://cdn.shopify.com/s/files/1/0461/0942/5828/files/guvananelagigawozefojinod.pdf
    • https://cdn.shopify.com/s/files/1/0439/0299/2536/files/benibidawoxapudugopo.pdf
    • https://cdn.shopify.com/s/files/1/0435/8176/7848/files/revafisedeniniselel.pdf
    • https://cdn.shopify.com/s/files/1/0433/6805/4940/files/42753189816.pdf
    • https://cdn.shopify.com/s/files/1/0434/9899/5864/files/78591265564.pdf
    • https://cdn.shopify.com/s/files/1/0443/9402/1030/files/android_app_to_convert_webpage_to.pdf
    • https://cdn.shopify.com/s/files/1/0434/8149/7766/files/zisozonamularutodizilole.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/11303760809.pdf
    • https://cdn.shopify.com/s/files/1/0432/8570/8953/files/29817088495.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_off00006477.bin
7410443e980000f400870b8b5fe8e38f7cd31edf05e446f6c327e52e85374a61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6477 5948 bytes
font_01_sfnt_off000078c4.bin
f7c4fbd12acfbcd458b51264ec028a1e7354748295984d18229d57338abdf52a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78C4 7328 bytes
font_02_sfnt_off00008cc1.bin
643d71e0d25f008dbe5900c247607c34c4f24cc9c069794593165aefa8bcd8eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC1 9972 bytes

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