Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdf98acfe01ef187…

MALICIOUS

PDF

38.8 KB Created: 2020-08-10 15:10:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37efa12839e1cc9e94ce9f824d37b63a SHA-1: c4e0a6e54b120833adac8b40bc41ee88c682e1eb SHA-256: cdf98acfe01ef187986e37433f58f8cb4fd44502459ef2753f092fc5b18f72ac
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF document contains a link farm designed to appear as search results for 'mpsc answer key pdf download'. The primary link, https://ttraff.cc/pify?keyword=mpsc+answer+key+pdf+download, is a known malicious redirector. The document body itself is heavily obfuscated but contains this same URL, indicating the intent is to lure the user into clicking the malicious link. The ML classifier strongly supports the malicious verdict.

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.cc/pify?keyword=mpsc+answer+key+pdf+download
    • http://files.clevelanddance411.com/uploads/1/3/0/7/130740012/3297077.pdf
    • http://files.forhisgloryministriescenter.com/uploads/1/3/0/7/130776460/nawap_gunuga_sirutobabag_zonizo.pdf
    • http://files.thejadebeagle.com/uploads/1/3/1/4/131453028/36b96181282222a.pdf
    • https://cdn.shopify.com/s/files/1/0433/7411/7015/files/79069872768.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1810/files/netflix_wii_u.pdf
    • https://cdn.shopify.com/s/files/1/0432/4173/4301/files/45088338175.pdf
    • https://cdn.shopify.com/s/files/1/0427/4126/8647/files/lituzukobajiwebukab.pdf
    • https://cdn.shopify.com/s/files/1/0430/3791/7333/files/fadetifazaxejejanuwizuxi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9318/1087/files/83383033124.pdf
    • https://cdn.shopify.com/s/files/1/0435/1374/1471/files/24969708251.pdf
    • https://cdn.shopify.com/s/files/1/0445/3564/4319/files/how_to_change_taskbar_color.pdf
    • https://cdn.shopify.com/s/files/1/0429/7077/5706/files/74533106078.pdf
    • https://cdn.shopify.com/s/files/1/0436/0726/1341/files/vedifej.pdf
    • https://cdn.shopify.com/s/files/1/0438/4574/6838/files/83139637327.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_off00005931.bin
659ffceb75174a1acd5c2a53fae1d645da2f0787a5259360678c99ece4d6445a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5931 5412 bytes
font_01_sfnt_off00006bbe.bin
81210acb645bd6e9d117bb7c6acd09f09ed72ee3e3842503412a47b802f65a20
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BBE 10188 bytes