Malicious PDF — malware analysis report

Static analysis result for SHA-256 1701fd8baa8e37c0…

MALICIOUS

PDF

79.6 KB Created: 2020-09-10 10:10:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd3fc3ad9b51c7da56dae424cf830d43 SHA-1: b9f3aeb5d6fa4ffa2840fb22705a9c985a46d157 SHA-256: 1701fd8baa8e37c08b38ed8563ee7fa96fe3a724fd66d7cf7d2c89ea0cbd44c8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically https://ttraff.ru/wb?keyword=arthashastra%20in%20urdu%20pdf%20free%20download. It also exhibits characteristics of a PDF SEO link farm, containing numerous external links. The document body, though heavily obfuscated, contains the same malicious URL and several benign-looking URLs, suggesting a deceptive lure to drive traffic to the malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.ru/wb?keyword=arthashastra%20in%20urdu%20pdf%20free%20download
    • http://fedorahosted.org/lohit
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/a891c0_90581a4ea8ab411ead142a99aa26e9b2.pdf
    • https://static.usrfiles.com/ugd/c5d40f_c4b0237d1db14aad90f3419b736a6e61.pdf
    • https://static.usrfiles.com/ugd/9734e7_7d09b496a69b49edb37cf9ce6a1d1103.pdf
    • https://static.usrfiles.com/ugd/d2751c_0caf03df413341ef866a8d39a2bbefe0.pdf
    • https://static.usrfiles.com/ugd/9c0842_2db76bfc18dd47f1bd7c78c0dab5b50f.pdf
    • https://static.usrfiles.com/ugd/55e2c6_e6c5feab5c6743b290455d8c51d487ab.pdf
    • https://cdn.shopify.com/s/files/1/0437/6847/9906/files/os_argonautas_do_pacfico_ocidental_coleo_os_pensadores.pdf
    • https://cdn.shopify.com/s/files/1/0438/9981/4056/files/a_pictorial_cyclopedia_of_philippine_ornamental_plants.pdf
    • https://static.usrfiles.com/ugd/417718_0f58ca7856e94b82950968c3aea425e5.pdf
    • https://static.usrfiles.com/ugd/67e251_ea65d49231d84b08a2485bcf5b83d0fc.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0000ef11.bin
afef2cc61c046bdcb273b7192e76df2509897f58ab3f2143aeb138b7975ca96b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xEF11 22368 bytes
font_00_sfnt_off0000a690.bin
1535d0d4a0ed9f8d1c9f4ca1ff699cbb3c65ea40c1634c6ed0eda65053339ee1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA690 5092 bytes
font_01_sfnt_off0000b7e1.bin
4f60b374cbf2a68c08ee4e6e5bd880b9285dc74a309ed42da0b9c7a2c0026502		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB7E1 3720 bytes
font_02_sfnt_off0000c340.bin
4ddc0e480eb6f29f445f32a29f06ea432e89325fe77cfeb857f0cf771cba6edd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC340 8972 bytes
font_03_sfnt_off0000e113.bin
ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE113 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.