Malicious PDF — malware analysis report

Static analysis result for SHA-256 186da3b280429622…

MALICIOUS

PDF

64.3 KB Created: 2020-09-16 14:50:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03cbb4f4e13a266074fe0cddb144ded0 SHA-1: 16c0ba0b8a8d65aadfc941fd501289ec97cd91d3 SHA-256: 186da3b280429622176581f6a6ff29b7dfd4faa80f68945a7d353acceef751a1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a redirector URL, identified as malicious. This link is presented within the document body, suggesting a phishing or scam attempt to direct users to harmful content. The presence of a large number of external PDF links further indicates a link farm or SEO manipulation tactic, likely to obscure the malicious redirector.

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.ru/wix?keyword=spirituality+of+imperfection+free+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0448/9386/4091/files/17352077439.pdf
    • https://cdn.shopify.com/s/files/1/0432/2181/1362/files/apnealink_report_results.pdf
    • https://cdn.shopify.com/s/files/1/0431/2452/3170/files/17327691158.pdf
    • https://cdn.shopify.com/s/files/1/0437/0799/0169/files/where_rainbows_end_cecelia_ahern_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/6349/1222/files/dexexebusujobomifaz.pdf
    • https://cdn.shopify.com/s/files/1/0434/0006/9285/files/mulomezutufinuf.pdf
    • https://1b6f36bd-2ece-493a-bda4-7da7d2cd8f06.filesusr.com/ugd/4b874d_29d41badef08491487940a43f68c358b.pdf?index=true
    • https://0e26175e-70c9-4ea5-9f32-64e9f77fafd5.filesusr.com/ugd/3be48b_963d7ad2d4934ec38f647bed5e83a49f.pdf?index=true
    • https://773d5987-8dd5-4c25-919a-abb7f4e10bf2.filesusr.com/ugd/2994dd_c2412b4832434302b05669124e6dc223.pdf?index=true
    • https://ac033be8-226c-46f5-904a-0b782e59ed79.filesusr.com/ugd/65b209_6be44c7c24394313a5da9cf2668030c8.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0432/1679/7857/files/forgotten_password_excel_sheet_2016.pdf
    • https://cdn.shopify.com/s/files/1/0433/6238/6074/files/nozidofip.pdf
    • https://cdn.shopify.com/s/files/1/0434/0239/5813/files/kezadutet.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_off0000be5f.bin
1d193496ab3cecbf1eec95b0800b094edecca29a678274e47221abd436227818
pdf-font-stream PDF embedded font (sfnt) at offset 0xBE5F 5328 bytes
font_01_sfnt_off0000d076.bin
d49565d88989267e705a0c0d5cc8af9d4d76b5bcbbf9d53df27b3c75f71f3ff7
pdf-font-stream PDF embedded font (sfnt) at offset 0xD076 10436 bytes