Malicious PDF — malware analysis report

Static analysis result for SHA-256 771802241c8fd7e3…

MALICIOUS

PDF

140.9 KB Created: 2020-09-05 15:16:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c7cab94ad7627da395162b4a60b6b13 SHA-1: 70cf1c61f2ffe4a59f70cbd6a93c849edb7fb1ae SHA-256: 771802241c8fd7e3617363094eb1391a0f7c3d62fdde4ed9ca76645ca7b49390
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised with a search query for "Telugu christian songs free 2018". This suggests a phishing or scam attempt to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

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=telugu+christian+songs+free++2018
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0429/6110/9148/files/hematopoiesis_indonesia.pdf
    • https://cdn.shopify.com/s/files/1/0439/1724/6632/files/commutative_algebra_books.pdf
    • https://cdn.shopify.com/s/files/1/0432/8764/2270/files/descargar_evangelios_apocrifos_completos.pdf
    • https://cdn.shopify.com/s/files/1/0435/6833/2968/files/technics_sl-5_service_manual.pdf
    • https://static.usrfiles.com/ugd/1c8c6c_e5b5bca9bbe24a8895898adcd38f1497.pdf
    • https://static.usrfiles.com/ugd/429b25_52e5bd1d8e5b434abdf6e29638c7932f.pdf
    • https://static.usrfiles.com/ugd/dcfb95_d2f314408d404955b7e84610cab3acab.pdf
    • https://static.usrfiles.com/ugd/b0cb2d_ad024511c57141d086911427ef757cc1.pdf
    • https://static.usrfiles.com/ugd/f0e51d_68ce28a79bab4bdd842d88bf1e7c7e52.pdf
    • https://static.usrfiles.com/ugd/3de8a6_45f4a3bb045f41df8560d63499f660a1.pdf
    • https://static.usrfiles.com/ugd/0047a4_c874ce97df4f45c282c16edbd575793b.pdf
    • https://static.usrfiles.com/ugd/409ca8_b4de702f8b774146b37f21baf191a2f6.pdf
    • https://static.usrfiles.com/ugd/aa14a9_cb9aefc99bb74d1597f88b995b3b3be6.pdf
    • https://static.usrfiles.com/ugd/b8c837_57428347f6fc468890c7973cfa0577a9.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ba63.bin
4b5d33275cc016d701e51f70a0a0ac15aec46e365d07e191c92adbbad1096ad2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BA63 5612 bytes
font_01_sfnt_off0001cd7c.bin
840b513b9da45e703b2db42402add1eabad48830ad203c1b49662f340b6ba292		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CD7C 19504 bytes
font_02_sfnt_off0001f99a.bin
38ca084739a6cd1d1fe7e3af5460ae527ab365e37d155cba0c08682cab75faaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F99A 14244 bytes

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