Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd2e90f11749c46f…

MALICIOUS

PDF

41.7 KB Created: 2020-08-21 18:40:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1cf714324fee70e0732856293d6526e2 SHA-1: dcef05bb45360f54e03f4f713090abec52ed7da9 SHA-256: cd2e90f11749c46f261cd303a228e37e5efe4158031939ab7a1eb11f770dc4fa
152 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The primary malicious URL identified is https://ttraff.com/pify?keyword=dupont+schedule+template, which is likely used for phishing or malware delivery. The document body, though heavily obfuscated, contains references to 'Dupont schedule template' and the same malicious URL, reinforcing the phishing lure.

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.com/pify?keyword=dupont+schedule+template
    • http://files.becomeacontractor.com/uploads/1/3/0/8/130813095/3811965.pdf
    • https://cdn.shopify.com/s/files/1/0435/8583/1070/files/96268310363.pdf
    • https://cdn.shopify.com/s/files/1/0431/4886/9789/files/sazirino.pdf
    • https://cdn.shopify.com/s/files/1/0433/5602/9093/files/winenopavodesuj.pdf
    • https://cdn.shopify.com/s/files/1/0435/5863/3627/files/7835938957.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/muxajuvorupi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6430/3522/files/posediligogoboraxixuza.pdf
    • https://cdn.shopify.com/s/files/1/0431/2881/5783/files/pewdiepie_s_minecraft_seed.pdf
    • https://cdn.shopify.com/s/files/1/0433/1778/8830/files/64123462679.pdf
    • https://cdn.shopify.com/s/files/1/0429/5419/5097/files/tozubewojonusosawusuk.pdf
    • https://cdn.shopify.com/s/files/1/0435/3989/0327/files/11400901303.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006700.bin
b11e96f873412e0b25e27d41d2fc0badef9d8e04fb7fca028eb55c70e694310d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6700 5216 bytes
font_01_sfnt_off0000788e.bin
2ac9042756133ccd59c3e36f6c3d75a8081c44206b902612e810ff25392bb33e
pdf-font-stream PDF embedded font (sfnt) at offset 0x788E 10004 bytes