Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ccf49b8c95b48d2…

MALICIOUS

PDF

41.2 KB Created: 2020-08-15 08:11:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acfd60ebb4b384aaddecd331e401b445 SHA-1: e65d6ac4b09aa9c2a7db8f28ab581dd451c01dcf SHA-256: 6ccf49b8c95b48d2191e28691c95059bef3831442d214dea0bc775ab357035c0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a malicious redirector, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic firing. It contains a large number of external links, many of which point to Shopify domains but are likely part of a link farm designed to obscure the ultimate destination. The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=android+9.+0+pie+easter+egg', which is known to host redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious.

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=android+9.+0+pie+easter+egg
    • http://besagaje.rughjohnsonlaw.com/uploads/1/3/1/4/131453028/xapamosidijupubu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4346/3069/files/4762594047.pdf
    • https://cdn.shopify.com/s/files/1/0430/7160/2855/files/asnt_tc_1a_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/2317/9677/files/cellulose_aerogel.pdf
    • https://cdn.shopify.com/s/files/1/0435/1524/8794/files/xofajesibebevevivuw.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/tejadenokoneseb.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3902/files/jesus_bleibet_meine_freude_klavier_noten.pdf
    • https://cdn.shopify.com/s/files/1/0432/5824/9376/files/85784000820.pdf
    • https://cdn.shopify.com/s/files/1/0434/7474/7545/files/catecismo_menor_de_westminster_comentado.pdf
    • https://cdn.shopify.com/s/files/1/0432/3121/5780/files/jutajabukukegefuku.pdf
    • https://cdn.shopify.com/s/files/1/0430/8356/3162/files/mekefom.pdf
    • https://cdn.shopify.com/s/files/1/0431/4755/9067/files/vufotawepamifuxir.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_off00006283.bin
f63ebace2a0f333d1949317b08837b7e0d1c5f95f98cda5b4f5bdf4ecb2482db
pdf-font-stream PDF embedded font (sfnt) at offset 0x6283 5412 bytes
font_01_sfnt_off000074f3.bin
8a7e002270f909ac7e4e443c229880dd90d5cf07b5f92af0b8b19fe6179e31f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x74F3 10424 bytes