Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7be36ac99ebebd3…

MALICIOUS

PDF

49.8 KB Created: 2020-08-18 16:00:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6d7e8aa7f027e0df5b585e8135f37d4 SHA-1: ad479c591fe8f9762d5c6eadc7009bb318078a95 SHA-256: f7be36ac99ebebd36efa81c6d1b2227246929cd866ac84f70a816d1e83a9ef9d
216 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.002 Spearphishing Attachment T1071.001 Web Protocols

The PDF contains multiple heuristics indicating malicious intent, including a critical finding of a PDF redirector link to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL. The presence of a 'SE_PAYMENT_REDIRECT_LURE' and 'SE_INVOICE_LURE' suggests a business email compromise or payment scam. The PDF also hosts a large number of external links, many pointing to Shopify, likely as part of a link farm to obscure the malicious redirector.

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.cc/pify?keyword=brela+tanzania+pdf
    • http://files.welcometomyhomepage.org/uploads/1/3/1/6/131607010/8005743.pdf
    • http://files.anniescandy.com/uploads/1/3/0/8/130873880/betogumadabebu_magozumetug_luzuxu.pdf
    • http://www.brela.go.tz/\
    • http://www.brela.go.tz/
    • https://cdn.shopify.com/s/files/1/0429/7916/4314/files/82223332940.pdf
    • https://cdn.shopify.com/s/files/1/0433/4161/1159/files/tinkle_digest_stories.pdf
    • https://cdn.shopify.com/s/files/1/0432/1922/2687/files/bescherelle_italien.pdf
    • https://cdn.shopify.com/s/files/1/0439/7219/8558/files/riluxoderaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/6223/1201/files/servsafe_study_guide_2017.pdf
    • https://cdn.shopify.com/s/files/1/0431/4130/0380/files/fotesagap.pdf
    • https://cdn.shopify.com/s/files/1/0429/2440/8991/files/jalirajoxa.pdf
    • https://cdn.shopify.com/s/files/1/0432/4343/8244/files/hindu_baby_names_for_girls.pdf
    • https://cdn.shopify.com/s/files/1/0428/3446/0828/files/ronavefosamumoki.pdf
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/35156437973.pdf
    • https://cdn.shopify.com/s/files/1/0447/3444/7770/files/breath_of_the_wild_wizzrobe.pdf
    • https://cdn.shopify.com/s/files/1/0437/2401/3722/files/codex_alimentarius_commission.pdf
    • https://cdn.shopify.com/s/files/1/0429/5576/7967/files/folidov.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_off0000871a.bin
72ea59e7a3f98b61048a23f9ff0bd2002e41e2866e5e120916e7b0a8ac0b5205		 pdf-font-stream PDF embedded font (sfnt) at offset 0x871A 4956 bytes
font_01_sfnt_off0000980c.bin
b849abca053be579bc57304e19ad4ad1f860fe8eb1190efefaaf57deda64b355		 pdf-font-stream PDF embedded font (sfnt) at offset 0x980C 10076 bytes

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