Malicious PDF — malware analysis report

Static analysis result for SHA-256 22925d73620e0d69…

MALICIOUS

PDF

47.3 KB Created: 2020-08-03 04:56:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6e308315069d954c9ffa825be539444 SHA-1: 0f938a6259b4e9156352e45d45094fe69906906b SHA-256: 22925d73620e0d694df633cba5edfd1f8d9aefa7c422a2e1bba069e3e583c8bf
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Mortal Kombat 2' and the malicious URL, suggesting a lure to trick users into clicking the link. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating a phishing or redirection attempt.

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=mortal+kombat+2+move+list
    • http://files.upwardfacinglife.com/uploads/1/3/1/4/131436971/velolerulamur_baxafijirun.pdf
    • http://files.lookingforhappiness.org/uploads/1/3/2/6/132682883/3983100.pdf
    • http://files.vector-business.com/uploads/1/3/1/4/131406831/porodenuti-ziful-rewuliwilo.pdf
    • http://files.larryrevoirdotcom.com/uploads/1/3/1/6/131606668/3331499.pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/pitutel.pdf
    • https://cdn.shopify.com/s/files/1/0430/7792/7063/files/fegerolilufar.pdf
    • https://cdn.shopify.com/s/files/1/0436/2646/3392/files/67507525635.pdf
    • https://cdn.shopify.com/s/files/1/0436/0703/1966/files/git_delete_changes.pdf
    • https://cdn.shopify.com/s/files/1/0432/7433/8472/files/35103675058.pdf
    • https://cdn.shopify.com/s/files/1/0429/1562/7175/files/5456752506.pdf
    • https://cdn.shopify.com/s/files/1/0431/1495/4908/files/porejisiterolizezogiweg.pdf
    • https://cdn.shopify.com/s/files/1/0432/7066/8453/files/26648339917.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34996744553.pdf
    • https://cdn.shopify.com/s/files/1/0428/6545/9366/files/pefipite.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6165/files/28186046378.pdf
    • https://cdn.shopify.com/s/files/1/0427/7580/6119/files/88000813021.pdf
    • https://cdn.shopify.com/s/files/1/0436/3098/5376/files/42162243221.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_off00006f4f.bin
ff0b66620e9f488087f9110215d851ad4d93b4e3cad2c415305db5323bcf124c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F4F 5232 bytes
font_01_sfnt_off00008114.bin
6db24cac37c7741a854c675bd9cf9181e4743d6192d4140a1321ab9585d0d84f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8114 15312 bytes