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) First seen: 2026-05-09
MD5: bd3fc3ad9b51c7da56dae424cf830d43 SHA-1: b9f3aeb5d6fa4ffa2840fb22705a9c985a46d157 SHA-256: 1701fd8baa8e37c08b38ed8563ee7fa96fe3a724fd66d7cf7d2c89ea0cbd44c8
194 Risk Score

Malware Insights

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

The PDF file contains a link to a redirector URL, which is part of a link farm designed to attract traffic. The document body, though heavily obfuscated, contains the lure text 'Arthashastra in urdu pdf free download' and the malicious URL. The ML classifier strongly indicates maliciousness, and the PDF structure suggests it's designed to drive traffic to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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 In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static.usrfiles.com/ugd/a891c0_90581a4ea8ab411ead142a99aa26e9b2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c5d40f_c4b0237d1db14aad90f3419b736a6e61.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9734e7_7d09b496a69b49edb37cf9ce6a1d1103.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d2751c_0caf03df413341ef866a8d39a2bbefe0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9c0842_2db76bfc18dd47f1bd7c78c0dab5b50f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/55e2c6_e6c5feab5c6743b290455d8c51d487ab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6847/9906/files/os_argonautas_do_pacfico_ocidental_coleo_os_pensadores.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9981/4056/files/a_pictorial_cyclopedia_of_philippine_ornamental_plants.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/417718_0f58ca7856e94b82950968c3aea425e5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/67e251_ea65d49231d84b08a2485bcf5b83d0fc.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0000ef11.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xEF11 22368 bytes
SHA-256: afef2cc61c046bdcb273b7192e76df2509897f58ab3f2143aeb138b7975ca96b
font_00_sfnt_off0000a690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA690 5092 bytes
SHA-256: 1535d0d4a0ed9f8d1c9f4ca1ff699cbb3c65ea40c1634c6ed0eda65053339ee1
font_01_sfnt_off0000b7e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7E1 3720 bytes
SHA-256: 4f60b374cbf2a68c08ee4e6e5bd880b9285dc74a309ed42da0b9c7a2c0026502
font_02_sfnt_off0000c340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC340 8972 bytes
SHA-256: 4ddc0e480eb6f29f445f32a29f06ea432e89325fe77cfeb857f0cf771cba6edd
font_03_sfnt_off0000e113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE113 4324 bytes
SHA-256: ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c

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