Malicious PDF — malware analysis report

Static analysis result for SHA-256 9753e1ddb2293814…

MALICIOUS

PDF

52.9 KB Created: 2020-08-07 06:41:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16247c9478af33a47e18c0f2d00dc482 SHA-1: ef6f327ca1e27d1b2839b2f080ec3c344d4381c2 SHA-256: 9753e1ddb2293814c636eddce6a51dd30d6810a1e2b810b497c97a0038070a82
152 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous external links, including a critical redirector link to 'https://ttraff.cc/pify?keyword=march+past+commands+pdf'. This indicates a strong attempt to lure the user to a malicious destination. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the PDF structure and embedded links are sufficient to infer 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.cc/pify?keyword=march+past+commands+pdf
    • http://files.lucysagilityeq.com/uploads/1/3/0/9/130969218/mivomanosoberuxuxor.pdf
    • http://files.tulsachurchofchrist.com/uploads/1/3/1/4/131437599/vadotujuzudefufiva.pdf
    • http://files.iwuznoodlin.com/uploads/1/3/0/7/130739052/2849670.pdf
    • http://files.homesimpledenver.com/uploads/1/3/1/0/131070918/wifegugewixogu_nabawe_divojijarib_bafufad.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/html_table_width.pdf
    • https://cdn.shopify.com/s/files/1/0428/3033/2060/files/57802659099.pdf
    • https://cdn.shopify.com/s/files/1/0432/0568/9499/files/admin_supervisor_job_description.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0983/files/miwukes.pdf
    • https://cdn.shopify.com/s/files/1/0430/0223/2983/files/foluxujegesej.pdf
    • https://cdn.shopify.com/s/files/1/0435/9228/6363/files/2705448111.pdf
    • https://cdn.shopify.com/s/files/1/0427/9464/7719/files/tilerigumofeditururizor.pdf
    • https://cdn.shopify.com/s/files/1/0427/7207/0556/files/que_es_el_diagnostico_organizacional.pdf
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/fujemuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/7778/0134/files/bestiario_mitologico_nordico.pdf
    • https://cdn.shopify.com/s/files/1/0437/1238/1079/files/pukategexopedazurezemu.pdf
    • https://cdn.shopify.com/s/files/1/0435/7950/6847/files/99017828936.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_off000090f4.bin
b96c32ac6d5e225554c6f0e3557150e1fa35c48a958a7bbd4de925d01d09b16d
pdf-font-stream PDF embedded font (sfnt) at offset 0x90F4 5368 bytes
font_01_sfnt_off0000a317.bin
403a8a4ca0adcc78bd3b6c63d00b79b149e543cb129fd6b4c2aa4e1626f4f551
pdf-font-stream PDF embedded font (sfnt) at offset 0xA317 10468 bytes