Malicious PDF — malware analysis report

Static analysis result for SHA-256 f22982f39f8d1916…

MALICIOUS

PDF

35.7 KB Created: 2020-08-25 03:00:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22597cc8b343a8afc1c5fb834d8c98c9 SHA-1: 00130f047cef35a2052eb6b00552a1373b20efe6 SHA-256: f22982f39f8d1916368118e9b4321fa9f6519d41430915e7c5780c1bc7ecebbb
154 Risk Score

Malware Insights

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

The PDF contains a prominent link to a redirector URL, disguised with text related to 'child birth delivery video free'. This indicates a social engineering lure to drive traffic to malicious infrastructure. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links, including the redirector, supports this assessment. No scripts were extracted, but the primary attack vector appears to be a malicious link embedded within the document.

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=child+birth+delivery+video++free
    • http://files.riskinpractice.co.uk/uploads/1/3/0/8/130814856/jorirajas.pdf
    • http://files.paintingsbyjacquelinekottwolle.com/uploads/1/3/2/6/132681517/41ecbd056fe001.pdf
    • https://cdn.shopify.com/s/files/1/0437/0238/6856/files/58096622125.pdf
    • https://cdn.shopify.com/s/files/1/0435/3202/6008/files/security_bank_personal_loan_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0443/8504/2598/files/epochenberblick_aufklrung.pdf
    • https://cdn.shopify.com/s/files/1/0450/4174/6078/files/96244466164.pdf
    • https://cdn.shopify.com/s/files/1/0437/0956/3034/files/29171048038.pdf
    • https://cdn.shopify.com/s/files/1/0436/2423/5170/files/69578280498.pdf
    • https://cdn.shopify.com/s/files/1/0430/2703/8369/files/getupumibepelasivil.pdf
    • https://cdn.shopify.com/s/files/1/0434/5459/5224/files/70629394092.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/memaroze.pdf
    • https://cdn.shopify.com/s/files/1/0429/5308/0991/files/chori_chori_film_ke_gane.pdf
    • https://cdn.shopify.com/s/files/1/0437/6952/8471/files/gofejavelisijusir.pdf
    • https://cdn.shopify.com/s/files/1/0433/3119/0952/files/mud_battlestaff_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0433/9610/4348/files/41513639948.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_off00005027.bin
94f5a7117729b60f746b2ac9101ef2e2394aca668e5fb11f9f086ae4ae99cdf0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5027 4812 bytes
font_01_sfnt_off00006086.bin
3640707b944e5cf00dafce627f752660213fc7280386943501251fd22bfda842
pdf-font-stream PDF embedded font (sfnt) at offset 0x6086 9772 bytes