Malicious PDF — malware analysis report

Static analysis result for SHA-256 3966816be2599d0d…

MALICIOUS

PDF

46.5 KB Created: 2020-08-25 01:52:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 167966393054dab319c9d9a97c997740 SHA-1: ee287430d8a84f4f21ca198845a9b67cef0f6cbd SHA-256: 3966816be2599d0d407e00d1e86bd76198a6c46d2459a4af72394c94cd9d7045
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=asthma+and+allergy+treatment+guidelines'. This indicates a phishing or social engineering attempt to direct users to malicious infrastructure. The document also exhibits characteristics of a link farm, with numerous embedded links, many pointing to Shopify domains, likely for SEO manipulation or to obscure the malicious destination. No scripts were extracted, but the presence of a malicious redirector is sufficient evidence of a phishing attack.

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=asthma+and+allergy+treatment+guidelines
    • http://files.stittleburgrhc.com/uploads/1/3/0/7/130740530/968688.pdf
    • http://xazatedax.kwdllc.net/uploads/1/3/1/6/131637814/6274486.pdf
    • https://cdn.shopify.com/s/files/1/0428/3626/3078/files/dumadarifutunivozoru.pdf
    • https://cdn.shopify.com/s/files/1/0431/5496/4629/files/asterix_and_obelix_xxl_2_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/9770/2046/files/judominikusezi.pdf
    • https://cdn.shopify.com/s/files/1/0438/7504/1435/files/37834323510.pdf
    • https://cdn.shopify.com/s/files/1/0437/8735/4270/files/dino_run_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/bakery_layout_design.pdf
    • https://cdn.shopify.com/s/files/1/0437/8702/6581/files/38549233571.pdf
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/rujonumumatatotoxolube.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5908/files/78434940641.pdf
    • https://cdn.shopify.com/s/files/1/0428/3459/1907/files/sovekigekul.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lovukapovilelogitolosir.pdf
    • https://cdn.shopify.com/s/files/1/0428/4655/2227/files/28256464.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069d7.bin
19e0115601b25c6b59a9dcd7530218610081e0ac52493a287422a2a77ad0e1a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69D7 5100 bytes
font_01_sfnt_off00007af3.bin
b21324ca8a3444c3c4dae9235744db3974597f168ce507bb8a33c29678a926be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF3 10604 bytes
font_02_sfnt_off00009f38.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F38 4324 bytes

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