Malicious PDF — malware analysis report

Static analysis result for SHA-256 20d174e2c1339cf5…

MALICIOUS

PDF

45.5 KB Created: 2020-08-06 11:41:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 249af5301d6c09dbea1bd00bde825011 SHA-1: 3b02621d86792cf3e1ce314b71cc9a7f5f934eed SHA-256: 20d174e2c1339cf575977f1de7103bdada9276e9015aa7ffed8304540cf61339
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm. The primary malicious URL, 'https://ttraff.com/pify?keyword=estrous+cycle+in+cattle+pdf', is a known malicious redirector. This suggests the document's purpose is to lure users into clicking these links, leading them to potentially malicious websites for phishing or malware delivery. No scripts were extracted, but the PDF structure and link farm are strong indicators of malicious intent.

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=estrous+cycle+in+cattle+pdf
    • http://files.actadrian.com/uploads/1/3/0/8/130873914/jonune-vobavifado.pdf
    • http://files.laparkcavaliers.com/uploads/1/3/1/4/131406391/f978cac65.pdf
    • http://files.backdoortheatre.org/uploads/1/3/1/4/131454501/fonudusatikovitab.pdf
    • http://files.dst777.org/uploads/1/3/0/7/130739024/a1cfbb2e6.pdf
    • http://files.faithmeadowsfarms.com/uploads/1/3/1/1/131163761/1349666.pdf
    • https://cdn.shopify.com/s/files/1/0431/2619/4336/files/62782904420.pdf
    • https://cdn.shopify.com/s/files/1/0436/4782/8133/files/22229211559.pdf
    • https://cdn.shopify.com/s/files/1/0433/4324/9563/files/12486070490.pdf
    • https://cdn.shopify.com/s/files/1/0434/3998/0711/files/radajiwanefigamiwa.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/petixu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9613/7111/files/mufazibazeral.pdf
    • https://cdn.shopify.com/s/files/1/0433/2955/2552/files/52568214055.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zugazad.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/babasetaxoguvivowe.pdf
    • https://cdn.shopify.com/s/files/1/0434/9339/2536/files/tolasugu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3369/8209/files/kulunil.pdf
    • https://cdn.shopify.com/s/files/1/0432/4743/5940/files/tiberakel.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5893/files/bafatumevefizevavu.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_off00007519.bin
3d85bc7278efb562418af39dd6a4a5b247e1ee6e9e9a8645182eacbca2fa2d50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7519 5208 bytes
font_01_sfnt_off000086f0.bin
c65f2e07ed0444638a1e06fea9f64041894cdd8e44143f061040034e72e9871c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86F0 9972 bytes

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