Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa3b4ed619edd38b…

MALICIOUS

PDF

66.1 KB Created: 2020-08-12 08:22:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1a63b9ec6aab9da1d81f96564098e21 SHA-1: 7c10fde86d52d6aeeb7e362c542436aba5c3afe3 SHA-256: aa3b4ed619edd38ba6cf48207b328c2676dc6e2707561220b2ec754c064f1335
160 Risk Score

Malware Insights

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

The PDF contains a lure related to salary claims and includes a high number of embedded links, many pointing to Shopify domains. One critical heuristic indicates a malicious redirector link to 'ttraff.com', which is likely the primary malicious destination. The document body, though heavily obfuscated, contains the same malicious URL and other PDF links, suggesting a link farm or redirection strategy to deliver a payload or phish credentials.

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.
  • 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
  • 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=authorization+letter+to+claim+salary+pdf
    • http://files.winnoenergy.com/uploads/1/3/0/8/130874633/4222490.pdf
    • http://files.mountbarkerstrathcatholic.com/uploads/1/3/1/4/131407796/javatuposoxati.pdf
    • http://files.astorialogisticsgroup.com/uploads/1/3/1/4/131483343/kopuxov.pdf
    • https://cdn.shopify.com/s/files/1/0430/1075/2663/files/discord_clear_messages.pdf
    • https://cdn.shopify.com/s/files/1/0433/3151/8622/files/defofiza.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/asbabun_nuzul_al.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xiguxalenagidofivixonagez.pdf
    • https://cdn.shopify.com/s/files/1/0430/5308/8921/files/potasiviwowune.pdf
    • https://cdn.shopify.com/s/files/1/0432/6309/9040/files/2234021512.pdf
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/faxegereg.pdf
    • https://cdn.shopify.com/s/files/1/0431/9661/2768/files/lufatakekejefa.pdf
    • https://cdn.shopify.com/s/files/1/0436/2734/8121/files/business_statistics_in_practice_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/4418/3974/files/74758889875.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/24501063531.pdf
    • https://cdn.shopify.com/s/files/1/0437/6992/1688/files/ridep.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb53.bin
4aba2bb845853324476be69e5ed1bf4ff35002942389efac2b843cac1129f0e9
pdf-font-stream PDF embedded font (sfnt) at offset 0xBB53 2828 bytes
font_01_sfnt_off0000c54e.bin
5347401c32d1075b138484e78b2a29f8f4f641f10b89afec52a50f1a291cbfc9
pdf-font-stream PDF embedded font (sfnt) at offset 0xC54E 5536 bytes
font_02_sfnt_off0000d809.bin
f0bb0b74087691515a9f3ffb839a955618747c2dfb295a84f43ede2e30b84df0
pdf-font-stream PDF embedded font (sfnt) at offset 0xD809 10240 bytes