Malicious PDF — malware analysis report

Static analysis result for SHA-256 72c294de06e37d36…

MALICIOUS

PDF

44.2 KB Created: 2020-08-09 20:10:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57286633bfba532a92f25da51bfde943 SHA-1: 1c65580ec5612eebe8ea162ec97822c60ca638fd SHA-256: 72c294de06e37d3695b877632c1f444f83b7439abe5faf4479faa6b4736f8c21
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The primary malicious URL identified is 'https://ttraff.ru/pify?keyword=storyboard+template+pdf+a3', which is likely used to direct users to a phishing or malware download site. The ML classifier also strongly indicated maliciousness.

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=storyboard+template+pdf+a3
    • http://files.knittygrittyoregon.com/uploads/1/3/1/1/131164538/milomuxawi-zopogitip.pdf
    • http://files.dlselectrical.com/uploads/1/3/0/7/130776406/nefalez.pdf
    • http://files.churchofchristncss.com/uploads/1/3/2/7/132740260/kipobekenejaxa_xokunuje_vamolobamokul_merukoxaw.pdf
    • http://files.gallery46.org/uploads/1/3/1/4/131454549/6697828.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/kawef.pdf
    • https://cdn.shopify.com/s/files/1/0436/6457/2569/files/47810966293.pdf
    • https://cdn.shopify.com/s/files/1/0431/4939/4071/files/zivexoloviluwafuvonizida.pdf
    • https://cdn.shopify.com/s/files/1/0434/4528/9112/files/puvusala.pdf
    • https://cdn.shopify.com/s/files/1/0436/4101/2374/files/milliseconds_in_a_day.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/2857609843.pdf
    • https://cdn.shopify.com/s/files/1/0434/6272/1688/files/drop_down_menu_php.pdf
    • https://cdn.shopify.com/s/files/1/0437/3512/2081/files/kidumuvagugolibolorivovu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/ragigutavozakatar.pdf
    • https://cdn.shopify.com/s/files/1/0428/4809/2323/files/60992532270.pdf
    • https://cdn.shopify.com/s/files/1/0428/2574/4540/files/cricket_score_sheet_for_10_overs.pdf
    • https://cdn.shopify.com/s/files/1/0433/0084/7780/files/wits_bsc_computer_science.pdf
    • https://cdn.shopify.com/s/files/1/0439/2468/4968/files/dovasejuramal.pdf
    • https://cdn.shopify.com/s/files/1/0429/6926/8373/files/28747637867.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_off000061df.bin
146962824dcc746f76b41e71000b809c79cfcdb4bb070a228e726b917d5f65b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61DF 5152 bytes
font_01_sfnt_off0000736b.bin
765f40d20db9505bccebe2c31ea753e4afeb9fb4c8c05db06af31d56be7257fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x736B 9956 bytes
font_02_sfnt_off0000956d.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x956D 4324 bytes

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