Malicious PDF — malware analysis report

Static analysis result for SHA-256 09b38600b8dcf59d…

MALICIOUS

PDF

58.3 KB Created: 2020-08-02 09:00:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b1800664b0e271363ed07d1122cbf49 SHA-1: 73db0b2c40a3c1195f4e64acf941ac4ee19742fc SHA-256: 09b38600b8dcf59d2c0af0ba27a03060bfb04f462d14a81eb6951deec1eb82a7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.com/pify?keyword=minecraft+scientist+skin'. The presence of a large number of external PDF links suggests a link farm or a mechanism for distributing further 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=minecraft+scientist+skin
    • http://files.councilreporter.com/uploads/1/3/1/3/131380042/5630754.pdf
    • http://files.mizpah36.org/uploads/1/3/1/3/131379045/6624586.pdf
    • http://files.livelovelaserclinic.com/uploads/1/3/1/1/131163666/021d4b53d35fdb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5850/2563/files/fexegisel.pdf
    • https://cdn.shopify.com/s/files/1/0431/0564/8801/files/xekolugumot.pdf
    • https://cdn.shopify.com/s/files/1/0434/3011/7526/files/vutegevagewuxepisoros.pdf
    • https://cdn.shopify.com/s/files/1/0431/3494/3389/files/looking_boy_instrumental.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/rugekoxunikal.pdf
    • https://cdn.shopify.com/s/files/1/0431/0774/5958/files/kim_jong_un_minecraft_skin.pdf
    • https://cdn.shopify.com/s/files/1/0436/0939/1261/files/lard_knife_party.pdf
    • https://cdn.shopify.com/s/files/1/0430/9306/5877/files/juremepubinuju.pdf
    • https://cdn.shopify.com/s/files/1/0431/1983/7345/files/ramoduwewawatikige.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a86b.bin
73b3a3bd3b29b62dd254a9bf99751720758f382e41ccfdb75f9e3b00904b1599
pdf-font-stream PDF embedded font (sfnt) at offset 0xA86B 4912 bytes
font_01_sfnt_off0000b942.bin
431a0bc8926266eedd559bf293360cc8563718c6d7b07bde01c2e9d454ff95f4
pdf-font-stream PDF embedded font (sfnt) at offset 0xB942 10420 bytes