Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d34d1c473fcda14…

MALICIOUS

PDF

53.0 KB Created: 2020-08-18 21:03:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5924110bbd9f591ccabab175142ee03 SHA-1: 63c14c5a2195a9108aa3327d8eb58a5708e2356c SHA-256: 0d34d1c473fcda14ea855e13f2d8e9dbeac65af36949b70c946b9114cb5733f9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a deceptive lure related to 'Bhojpuri movie 3gpp' and embeds a large number of links, including one pointing to a known malicious redirector. The ML classifier strongly indicated maliciousness, and the presence of numerous external links suggests an attempt to drive traffic to potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.ru/pify?keyword=bhojpuri+movie++3gpp
    • http://files.nirvanaklmalaysia.com/uploads/1/3/0/8/130815213/fuxobukasi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/50072973703.pdf
    • https://cdn.shopify.com/s/files/1/0437/6467/8817/files/45614662464.pdf
    • https://cdn.shopify.com/s/files/1/0432/8387/3942/files/tutosuxupike.pdf
    • https://cdn.shopify.com/s/files/1/0431/4526/5318/files/ambient_air_quality_guidelines_alberta.pdf
    • https://cdn.shopify.com/s/files/1/0434/2897/0647/files/zifajilabisenomur.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/garafawabavekavumuri.pdf
    • https://cdn.shopify.com/s/files/1/0430/0416/6297/files/77958175304.pdf
    • https://cdn.shopify.com/s/files/1/0429/7677/2250/files/possessive_s_and_possessive_adjectives_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0431/1000/6940/files/vocational_english.pdf
    • https://cdn.shopify.com/s/files/1/0430/8759/3632/files/9883259672.pdf
    • https://cdn.shopify.com/s/files/1/0436/3301/6982/files/pezarulafimu.pdf
    • https://cdn.shopify.com/s/files/1/0439/2304/6555/files/ayurvedic_book_in_gujarati.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_off00006f45.bin
66f05e6c11396dcd1242f84435ffd98f78aadb5a69d1987cdc11beb70bf6e6e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F45 5164 bytes
font_01_sfnt_off000080ce.bin
4370bd886547d9eb31f21f0937cd9957ec50ca61e658e78eb9f9d9ae5d78fbc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80CE 13844 bytes
font_02_sfnt_off0000ac08.bin
a5f77a729f6ee04eca155bb8b3eeee5f590a5e4bc004f450ac363101ef5467c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC08 8536 bytes

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