Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbccb71e02b43065…

MALICIOUS

PDF

54.9 KB Created: 2020-08-12 10:28:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e39a44337e885d04aa137f20c4846cc SHA-1: 7587fc93fa5ec1205d69908cd1d0478d870a198f SHA-256: bbccb71e02b430652efe96a0645359a4a6cfc24b3ea7f964e5b7e61a5d89bf34
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious infrastructure at 'ttraff.cc'. This suggests a link farm or redirection attack designed to lead 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.cc/pify?keyword=shukra+kavacham+telugu+pdf
    • http://files.adriengossiome.com/uploads/1/3/1/0/131069934/2142242.pdf
    • http://files.hembladeacupuncture.co.uk/uploads/1/3/1/4/131438823/poduxu.pdf
    • http://files.prostatecure.ca/uploads/1/3/0/7/130775221/ziviw.pdf
    • http://files.aviewoflondon.com/uploads/1/3/1/4/131407351/9d6c68a97451a5.pdf
    • https://cdn.shopify.com/s/files/1/0435/5158/8507/files/84530753386.pdf
    • https://cdn.shopify.com/s/files/1/0445/9456/1188/files/check_font_style_in.pdf
    • https://cdn.shopify.com/s/files/1/0427/9664/6556/files/13363870888.pdf
    • https://cdn.shopify.com/s/files/1/0437/9371/1265/files/weather_for_newark_de.pdf
    • https://cdn.shopify.com/s/files/1/0432/9806/2501/files/91244325333.pdf
    • https://cdn.shopify.com/s/files/1/0453/9233/0920/files/daduxusurasalotuk.pdf
    • https://cdn.shopify.com/s/files/1/0438/3784/9762/files/kipitogi.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8282/files/repuriretivugelarusadud.pdf
    • https://cdn.shopify.com/s/files/1/0447/2055/4138/files/vans_old_skool_golf_wang.pdf
    • https://cdn.shopify.com/s/files/1/0434/6124/7138/files/67359385212.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000534c.bin
c831df44c952c7dbd0350f62731a6507b750a3dc3845601e467ee69864916726		 pdf-font-stream PDF embedded font (sfnt) at offset 0x534C 5620 bytes
font_01_sfnt_off0000664f.bin
dbaab8dcf32bfe64cb008f34eb54f5316f62236e8dffe3de49b44225404383a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x664F 2656 bytes
font_02_sfnt_off00007153.bin
c42118b51b061dffbc196cd4866a2cf76d9f31ae9d0a8f6c06e6ad224a677b24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7153 2328 bytes
font_03_sfnt_off00007c09.bin
4aae7f68130053168de8511368c157d8da9236b237ffff76cc19e63ce7dd145c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C09 13132 bytes
font_04_sfnt_off00009eca.bin
5298471374db89e98684e723dee152506bc494f17b26620d4b57451ec11783f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9ECA 10960 bytes
font_05_sfnt_off0000c1b6.bin
add4185822790a5ee1e9c023bb8c4f1a1e7574887708d88b220de2022cbb7d57		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1B6 2960 bytes

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