Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d934fa6d60f544b…

MALICIOUS

PDF

42.6 KB Created: 2020-08-10 07:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b71c4c1a8af6d068967244f782322ee SHA-1: 7490442bbd12219b979629061f23404fc196f216 SHA-256: 3d934fa6d60f544bbcf6363eb2464a0c55a70c9f8d054617e35a6339a2e2f309
128 Risk Score

Malware Insights

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

The PDF file contains a link farm and a malicious redirector link, disguised as a download for Adobe PDF Reader. The primary malicious URL, ttraff.ru, is used to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains references to the malicious URL and benign-looking PDF files hosted on Shopify, likely to appear legitimate. The presence of a download button lure further supports the social engineering aspect of this attack.

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=adobe+pdf+reader+offline+installer+for+windows+7
    • http://xomeguti.ideaventionsacademy.org/uploads/1/3/0/7/130739777/30b102e.pdf
    • http://galam.mx.campingasseiceira.com/uploads/1/3/1/4/131453284/diwolijabopex.pdf
    • http://files.baileeauna.com/uploads/1/3/0/7/130739202/vajenotob.pdf
    • http://files.regulatorycounsel.net/uploads/1/3/1/3/131380985/7a05c4f6c.pdf
    • http://nabefes.mauimadison.com/uploads/1/3/0/8/130815017/kegipowukufufis.pdf
    • https://cdn.shopify.com/s/files/1/0434/3028/1381/files/modele_avenant_contrat_de_travail_modification_salaire.pdf
    • https://cdn.shopify.com/s/files/1/0434/7694/3000/files/iphone_5c_schematic.pdf
    • https://cdn.shopify.com/s/files/1/0428/7833/7187/files/45463197179.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/18396470220.pdf
    • https://cdn.shopify.com/s/files/1/0433/6582/6719/files/62245602642.pdf
    • https://cdn.shopify.com/s/files/1/0435/4008/6935/files/88683876611.pdf
    • https://cdn.shopify.com/s/files/1/0429/8421/0583/files/oye_como_va_lyrics_translation.pdf
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/omc_stringer_outdrive_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/tezafagegoxurezokosof.pdf
    • https://cdn.shopify.com/s/files/1/0428/2748/1255/files/55192983213.pdf
    • https://cdn.shopify.com/s/files/1/0432/6624/4766/files/79683879666.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52657742202.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/lean_six_sigma_green_belt_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/fixumotoforakazanofutel.pdf
    • https://cdn.shopify.com/s/files/1/0431/8530/7808/files/70676914270.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006844.bin
7389eb01f2e67f663da296ac46c26186dfb67521f6bb93678493c12ce4433e90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6844 5336 bytes
font_01_sfnt_off00007a88.bin
968c1e3c83ac212454fe802e57710eb9a49b4eefca727dc211beee6c7bd76f03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A88 9900 bytes

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