Malicious PDF — malware analysis report

Static analysis result for SHA-256 f08c7fac1797289e…

MALICIOUS

PDF

45.7 KB Created: 2020-08-17 04:32:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c51ba8fbb68144573bba4c2091388c1 SHA-1: 36a23b1fb1b42be4f0d14da425c7225f6e1a7e76 SHA-256: f08c7fac1797289ef8cb05431962eba2c6ed9b37682cd4e8784f2c7960902f0a
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains the URL 'https://ttraff.cc/pify?keyword=hitchhiker+guide+famous+quotes', which is a known malicious redirector. The presence of numerous other links, many hosted on shopify.com, suggests a link farm designed to obscure the ultimate malicious destination or to distribute various payloads.

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=hitchhiker+guide+famous+quotes
    • http://xinike.myrealfarm.net/uploads/1/3/1/6/131637284/cb98d57b421d34e.pdf
    • https://cdn.shopify.com/s/files/1/0434/4715/6903/files/pirates_of_the_caribbean_theme_song_guitar_tabs.pdf
    • https://cdn.shopify.com/s/files/1/0434/5220/3161/files/76840930700.pdf
    • https://cdn.shopify.com/s/files/1/0430/5174/5442/files/81178620220.pdf
    • https://cdn.shopify.com/s/files/1/0437/7578/7169/files/19207035008.pdf
    • https://cdn.shopify.com/s/files/1/0437/6687/4266/files/camara_de_comercio_internacional_incoterms_2020.pdf
    • https://cdn.shopify.com/s/files/1/0440/7338/6136/files/fidaji.pdf
    • https://cdn.shopify.com/s/files/1/0434/6662/1094/files/canevas_du_projet.pdf
    • https://cdn.shopify.com/s/files/1/0437/1464/2069/files/bebudinelumevewed.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/75560980939.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000673f.bin
019d1d75a263d0c8c0fa227cc5279ccf99c669f8dc42fb91eb4cf8b2098a8d77
pdf-font-stream PDF embedded font (sfnt) at offset 0x673F 5328 bytes
font_01_sfnt_off00007951.bin
93b1b924349e37fa619f40854d496c1bb1ccce33d93ecca39a281ff8bf0275cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7951 10088 bytes
font_02_sfnt_off00009bd6.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x9BD6 4324 bytes