Malicious PDF — malware analysis report

Static analysis result for SHA-256 0635d58b02d86983…

MALICIOUS

PDF

48.8 KB Created: 2020-09-07 12:00:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01e92ae9af745d8b84d5a3fd8b612099 SHA-1: 4f2cfc497a0936cd3204a15ecefb9a286b059a62 SHA-256: 0635d58b02d8698310efaa419ecff55a539d4ab553d05164e9565ce90ec4e8d7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, with one identified as a malicious redirector. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests the document's purpose is to trick users into believing they are receiving a prize or parcel, a common advance-fee fraud tactic. The presence of a malicious redirector indicates an attempt to lead the user to a harmful site, likely to further the scam or deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.ru/pify?keyword=mmorpg+browser+games+for+android
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/52b593_34df09df95624df8b57e4facb3fbc3bf.pdf
    • https://static.usrfiles.com/ugd/e3834b_fd724e6d7a844a4eb9c153d6e299fee6.pdf
    • https://static.usrfiles.com/ugd/d775a9_f446a53c85ce4c26a162d05af443cf74.pdf
    • https://static.usrfiles.com/ugd/6e13d9_e74e95606027412cbd416660721a2549.pdf
    • https://cdn.shopify.com/s/files/1/0431/6846/5053/files/61577356778.pdf
    • https://cdn.shopify.com/s/files/1/0432/6581/8790/files/industrial_hygiene_and_sanitation.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3925/files/nurse_bedside_report_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/9005/9176/files/human_anatomy_systems.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/69908771674.pdf
    • https://cdn.shopify.com/s/files/1/0431/7937/6798/files/vlc_media_player_android_tv_apk.pdf
    • https://static.usrfiles.com/ugd/accd1f_9f3ad741234944528e22eecba0208421.pdf
    • https://static.usrfiles.com/ugd/a9248e_73c7be4a4aa84e2aa4d97802a7354fba.pdf
    • https://static.usrfiles.com/ugd/837d34_d1ac77b158aa4a15b7f15fea8497a59a.pdf
    • https://static.usrfiles.com/ugd/54b9a1_7497a3e064434229bd879b85ec470a63.pdf
    • https://static.usrfiles.com/ugd/16a96a_291492b413df442b8b1a4d75b0ed5d31.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_off00007e87.bin
c1e558d210505c5da7de5568165348ee38298b112990eb224167d75880fdb87a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E87 5568 bytes
font_01_sfnt_off00009175.bin
825fb6429dc08b8232adcc31972655f0b0492f04469eddd1fe0d9d88bf4446a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9175 10620 bytes

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