Malicious PDF — malware analysis report

Static analysis result for SHA-256 0336b0066703ef14…

MALICIOUS

PDF

44.8 KB Created: 2020-08-11 20:59:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 852a5f87b58211922e137eebf83db3f7 SHA-1: 9952212695222c76cef400c3fd954d745b60b97f SHA-256: 0336b0066703ef14e145376b7d872f845a6f04aa2a52a76269e9b5fc29c3ffa0
154 Risk Score

Malware Insights

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

The PDF document contains numerous links, including one pointing to a known malicious redirector at 'https://ttraff.com/pify?keyword=davis+drug+guide+atropine+pdf'. The document body, though obfuscated, appears to contain text related to a drug guide, suggesting a lure to trick users into clicking the malicious links. The presence of a large number of external PDF links further indicates a link farm or redirection scheme.

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=davis+drug+guide+atropine+pdf
    • http://wejasamer.nationalriskmanagementgroup.com/uploads/1/3/2/8/132814930/52b7849dd35.pdf
    • http://files.gerrymitchellproductions.com/uploads/1/3/0/7/130740068/522c2fa.pdf
    • http://fijofezi.rebeccalybrand.com/uploads/1/3/1/8/131871921/153476.pdf
    • http://files.enzymelabs.com/uploads/1/3/1/4/131438639/tafexijit_donej_xikav_gatutizusudine.pdf
    • http://files.poetic-healing.com/uploads/1/3/0/9/130969352/gejowox.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9451/5614/files/lore_of_the_bloodlines_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/6690/8054/files/menexogup.pdf
    • https://cdn.shopify.com/s/files/1/0430/4535/5674/files/20202533713.pdf
    • https://cdn.shopify.com/s/files/1/0435/5738/8437/files/egomaniac_vi_keeland_romana.pdf
    • https://cdn.shopify.com/s/files/1/0428/0877/0726/files/gafefidebiniwekumobozas.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/gexurilowenajafobiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/1659/3312/files/togewufewixegidisufofoze.pdf
    • https://cdn.shopify.com/s/files/1/0430/9070/6599/files/statistical_language_learning.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/puneson.pdf
    • https://cdn.shopify.com/s/files/1/0440/9376/7832/files/bambusa_tulda.pdf
    • https://cdn.shopify.com/s/files/1/0437/1690/3062/files/monophasic_and_biphasic_liquid_dosage_forms.pdf
    • https://cdn.shopify.com/s/files/1/0439/6145/0654/files/12684081124.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000689c.bin
002003cfa90b5c9a5f3f784a74eabd52f8787645a385a42e066500e57e9f35dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x689C 5236 bytes
font_01_sfnt_off00007a85.bin
cd044299edaede98e530d8cc68bf3a9f7e60b1ffc192aca6db488bc9baa79bf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A85 14072 bytes

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