Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b5c92900b99fe8b…

MALICIOUS

PDF

35.7 KB Created: 2020-07-31 21:14:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c63440fb091f9bdeaad4ff61dd632359 SHA-1: ef28ed6317c530bac51ee7c140f99369ef58d6d0 SHA-256: 9b5c92900b99fe8bc2ae8215f3d74348579bdc93cda75c8777126382d56a3168
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Earth science 13th edition pdf', suggesting a lure to download a specific document. The presence of a link farm and the redirector strongly indicate a phishing or malicious content delivery 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.com/pify?keyword=earth+science+13th+edition+pdf
    • http://files.newheightssda.com/uploads/1/3/1/4/131407823/474050.pdf
    • http://files.mmsoundandlighting.com/uploads/1/3/1/3/131379396/4521139.pdf
    • http://files.messforfun.com/uploads/1/3/2/6/132683292/xatakesefufupup-xubog.pdf
    • http://files.confederateplanet.com/uploads/1/3/0/7/130775866/19197425dd83.pdf
    • http://files.nerdwizardartist.com/uploads/1/3/1/3/131378835/lomave_kakujetuwapew.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/47184882359.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pufabupenidobuxix.pdf
    • https://cdn.shopify.com/s/files/1/0433/0684/4315/files/nopekaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/3966/1986/files/45902567605.pdf
    • https://cdn.shopify.com/s/files/1/0430/4705/9607/files/82250532629.pdf
    • https://cdn.shopify.com/s/files/1/0437/0658/1147/files/92388107369.pdf
    • https://cdn.shopify.com/s/files/1/0436/4576/3744/files/kupuwavulo.pdf
    • https://cdn.shopify.com/s/files/1/0439/2812/5595/files/29268126036.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89573664631.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/77409819543.pdf
    • https://cdn.shopify.com/s/files/1/0434/7019/2802/files/xeniboxilifewupi.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_off00004bd3.bin
11af9766c3583866c23b029f8fc26f4f7ebab2c4cab0d0ff7c4853d8f5cecded
pdf-font-stream PDF embedded font (sfnt) at offset 0x4BD3 5384 bytes
font_01_sfnt_off00005e22.bin
a5ab9dba5cee5d69536cabc594efc0ac678ec31b78d05909f303fcd44680f030
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E22 9984 bytes