Malicious PDF — malware analysis report

Static analysis result for SHA-256 07cc63b78fa43555…

MALICIOUS

PDF

45.0 KB Created: 2020-08-21 03:42:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e974055d05323dde2014a726d8be941 SHA-1: d9b6949eeb96ecae4a8fe84b06861e7601864de4 SHA-256: 07cc63b78fa435558e6bfe5151c8ea17ee32a6cd31f9a71b958a1f6cdcc15105
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body itself is heavily obfuscated but contains URLs that appear to be part of a link farm designed to lure users into clicking malicious links. The primary malicious URL identified is ttraff.ru, which is used to redirect users to potentially harmful content.

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=kuiu+guide+pants+rokslide
    • http://files.jessethomascomics.com/uploads/1/3/1/4/131409761/jopiliji-xudegupiro-faxonuvositog.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6881/6544/files/ignou_bcom_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0429/8991/2218/files/hyper_terminal_for_window_7.pdf
    • https://cdn.shopify.com/s/files/1/0430/7995/8679/files/bakenosoponoxogiren.pdf
    • https://cdn.shopify.com/s/files/1/0437/2440/6933/files/40384358052.pdf
    • https://cdn.shopify.com/s/files/1/0428/5143/4659/files/sunasejomekogem.pdf
    • https://cdn.shopify.com/s/files/1/0436/0028/1762/files/87564585810.pdf
    • https://cdn.shopify.com/s/files/1/0437/3243/5093/files/malayalam_bible_study_notes.pdf
    • https://cdn.shopify.com/s/files/1/0434/9739/0244/files/gumeluvepitugotebofuw.pdf
    • https://cdn.shopify.com/s/files/1/0443/0639/9388/files/hard_spelling_bee_words_for_college_students.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wuwikeg.pdf
    • https://cdn.shopify.com/s/files/1/0436/1509/2894/files/does_windows_10_have_opengl.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cbe.bin
776273d817315ebaa1e78f49dce3572a935ae9ab1df7711c64c8a2e9035876d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CBE 5160 bytes
font_01_sfnt_off00006e56.bin
62c3d449b8533df9828ce25c795081eb3582c33924083a9cc020c699d0a6c064		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E56 10536 bytes
font_02_sfnt_off00009293.bin
edc33fe94617b35fa5734827a91efdc9665031ac3a5a8b8018a6396f4204b3d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9293 16116 bytes

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