Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7453fb65d8f2dc4…

MALICIOUS

PDF

53.5 KB Created: 2020-08-20 08:47:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5aadaafbdf2f0e334f9762d6019a4141 SHA-1: ef768c782768865a7e150ae9802b728d96692ac9 SHA-256: d7453fb65d8f2dc4294f8c521a12164d96a9760487017513cdc5b3dc8dd58b38
128 Risk Score

Malware Insights

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

The PDF file contains a lure, presented as an 'Answer key of neet 2019 r1', which includes a link to a known malicious redirector. The PDF also contains a large number of embedded links, many pointing to shopify.com domains, suggesting a link farm or SEO poisoning attempt. The primary malicious IOC is the ttraff.ru redirector URL, which is likely used to deliver a secondary payload.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=answer+key+of+neet+2019+r1
    • http://files.christineyared.com/uploads/1/3/2/6/132680867/mujipapujize_xigusiza_wiwavudidali_zonomejom.pdf
    • http://files.bostonhooptroop.com/uploads/1/3/0/7/130776133/monolez-dapat-fawigonesob-nekemogirit.pdf
    • http://files.afoxhunting.com/uploads/1/3/0/9/130968996/7905690.pdf
    • http://tivotow.golden-meadowlark.com/uploads/1/3/2/6/132695569/2211346.pdf
    • https://cdn.shopify.com/s/files/1/0428/6827/7404/files/ralizexevifedif.pdf
    • https://cdn.shopify.com/s/files/1/0438/1098/0000/files/25495160307.pdf
    • https://cdn.shopify.com/s/files/1/0434/6642/4470/files/69172642081.pdf
    • https://cdn.shopify.com/s/files/1/0429/0582/9532/files/22289404820.pdf
    • https://cdn.shopify.com/s/files/1/0434/9437/5576/files/candidiasis_oral_tratamiento_en_nios.pdf
    • https://cdn.shopify.com/s/files/1/0434/8814/9668/files/50181800572.pdf
    • https://cdn.shopify.com/s/files/1/0434/7274/8710/files/wexituromixari.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/breakthrough_basketball_defense.pdf
    • https://cdn.shopify.com/s/files/1/0434/3683/4981/files/82116173824.pdf
    • https://cdn.shopify.com/s/files/1/0429/1425/0905/files/walajeg.pdf
    • https://cdn.shopify.com/s/files/1/0437/1188/9562/files/netflix_cracked_apk_onhax.pdf
    • https://cdn.shopify.com/s/files/1/0430/3765/5191/files/41981973164.pdf
    • https://cdn.shopify.com/s/files/1/0429/4960/7590/files/napur.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4985/files/jironivuzamepewidijelok.pdf
    • https://cdn.shopify.com/s/files/1/0429/7146/3831/files/nazibifujo.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_off00006d21.bin
ea54055f0f219849eb87ce29e62e12029000a822fb896d7dcf8ddc237f623965		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D21 5248 bytes
font_01_sfnt_off00007f25.bin
d479d5848069262d41ae534a4633aaa3734357bd461039e33bc7344ff130e97f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F25 6008 bytes
font_02_sfnt_off0000929a.bin
18eb778559699e8e0a680b415ac5e24471a279906e11e54da0720d8008cc6981		 pdf-font-stream PDF embedded font (sfnt) at offset 0x929A 10500 bytes
font_03_sfnt_off0000b67e.bin
4ecdcdb3451ac180455d3309f4468e9e888150cd58b4e735c7003573c6ab4e5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB67E 4896 bytes

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