Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5bf3c9ecd02fd68…

MALICIOUS

PDF

47.3 KB Created: 2020-09-16 20:07:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3cda30b4a24be8753d289f23a787bc1 SHA-1: 6cfeb7149f68e62ce7823dbcdbb934c69b0e5aab SHA-256: b5bf3c9ecd02fd68c8cd355cb0c620723c87a6e8128398010df8f7590231b3c0
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically directing to a malicious redirector disguised as a software download. The ML classifier strongly indicated maliciousness, and the presence of a link farm further supports a malicious intent to drive traffic to potentially harmful sites. The document body contains the lure text and the primary malicious URL.

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.club/wix?keyword=go+locker+pro+1.69+apk
    • http://mifano.lamarrugby.com/uploads/1/3/2/8/132814930/7146290.pdf
    • http://wazag.independentbaptistmissionforjamaicaandthedominicanrepublic.com/uploads/1/3/0/7/130776483/wokoda_lupaviv_xabukizujodetus.pdf
    • http://raxipugot.kitakoreatour.com/uploads/1/3/0/7/130776330/86f942b0.pdf
    • http://vofiveg.hollarchiropractic.com/uploads/1/3/1/3/131380550/1508ee56ef32494.pdf
    • https://cdn.shopify.com/s/files/1/0452/5680/2461/files/sway_dean_martin_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0439/2045/7883/files/renewable_energy_and_alternative_power_sources.pdf
    • https://cdn.shopify.com/s/files/1/0451/8179/6503/files/bilinguisme_avantages_inconvenients.pdf
    • https://cdn.shopify.com/s/files/1/0429/5986/3959/files/80987598425.pdf
    • https://8b5c1c7b-7209-4bdc-b77a-cc99969f1e63.filesusr.com/ugd/668a47_2363e27078b245ce8bad550d1f92e1c1.pdf?index=true
    • https://993dabc2-886d-43d0-8c92-fdf8d1a203f3.filesusr.com/ugd/81d6a4_632c332ec1aa4b95b64be405021ed0f4.pdf?index=true
    • https://10573eaf-945c-4925-9f42-032faa8bfae6.filesusr.com/ugd/3283b0_0efb8bbbfaba4a2584f8d5ff3df30a6a.pdf?index=true
    • https://57b66b88-5b56-4cfc-a83e-37a4a6db4dd4.filesusr.com/ugd/3bcfef_39d9b864c4fa418aac5ea41cbedfa3d8.pdf?index=true
    • https://f654991d-1c41-4b0d-8b10-cec3f5dfc0e0.filesusr.com/ugd/daca0d_c1e3870270ea4953a2ed97221085ae4c.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/mosazu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3095/4655/files/wire_bender_cnc.pdf
    • https://cdn.shopify.com/s/files/1/0428/5405/6092/files/xozokili.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000056b8.bin
191c4caca85a2ac216882dda63ba2b037542dfeff6489bc379200696c570b576		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56B8 4792 bytes
font_01_sfnt_off00006717.bin
f73edfcc66dab38148a410ad4366281337a7d9e0f9fc1df2ece32486c63e2316		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6717 10800 bytes
font_02_sfnt_off00008c51.bin
12aba8d421747cc7b6f64e0779b2b7b17ec51a7e5f572de6077b2104e12ed3a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C51 16336 bytes
font_03_sfnt_off0000a1d4.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1D4 4324 bytes

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