Malicious PDF — malware analysis report

Static analysis result for SHA-256 a431cf8f64e3fcd1…

MALICIOUS

PDF

77.2 KB Created: 2020-09-15 20:25:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7434e7a63b42a33c327b3dff4c54c14d SHA-1: cf3cda32c8530c9ed0e03bd86934eb0e7f67818d SHA-256: a431cf8f64e3fcd162cececd002db63c9321285a64ce32e2e7f907a608bfd69c
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a lure related to payment and bank details, as indicated by the 'SE_PAYMENT_REDIRECT_LURE' and 'SE_INVOICE_LURE' heuristics. It embeds a link to 'ttraff.club', which is flagged as a malicious redirector. The document body also contains the same URL, reinforcing the malicious intent. The presence of numerous external PDF links suggests a link farm for SEO manipulation or to distribute further malicious content.

Heuristics 5

  • 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
  • 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
  • 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/pify?keyword=fake+bank+transfer+receipt+generator
    • http://files.canalmusicfest.com/uploads/1/3/1/4/131437676/nupipunabidet_juwakum_vegari_gowifez.pdf
    • http://files.visaconnection-philippines.com/uploads/1/3/2/6/132695280/7ad51fa803.pdf
    • http://files.merrysny.shop/uploads/1/3/1/4/131454503/kiwebaf_bopipifavetut_gagibav.pdf
    • http://sosumovaj.aokcollectibles.com/uploads/1/3/0/9/130969204/1161555.pdf
    • http://files.termaxe.com/uploads/1/3/1/8/131872079/bebivu.pdf
    • https://static.usrfiles.com/ugd/21b4a7_b6f1082514444db683d786773534aabf.pdf
    • https://static.usrfiles.com/ugd/c1c462_023a75f1c7b644f3a93d3c38e463e10e.pdf
    • https://static.usrfiles.com/ugd/35e1ce_300246e2ccfa47179fb0cafcc7876ea8.pdf
    • https://static.usrfiles.com/ugd/02af14_8b4bddf959314c3397c2e6124de097df.pdf
    • https://static.usrfiles.com/ugd/a64c8c_5dc5fd17d297433f869ed4b7289b4497.pdf
    • https://static.usrfiles.com/ugd/7a359d_9be873bcce3b47d4bb19e188edfa970d.pdf
    • https://cdn.shopify.com/s/files/1/0436/9262/1978/files/64506628939.pdf
    • https://cdn.shopify.com/s/files/1/0463/6350/8891/files/automatic_clicker_pro_apk_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/0239/5813/files/mixing_audio.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_off0000e83c.bin
a17885b4fd577e0298a64705d5055d2ac7c2363fd7008e9cf236b3df412a17d8
pdf-font-stream PDF embedded font (sfnt) at offset 0xE83C 2828 bytes
font_01_sfnt_off0000f236.bin
15a6ba48f6cb2c1d0ef80f40589e4dfecb40d15f7a8b9269f403443c6d188ece
pdf-font-stream PDF embedded font (sfnt) at offset 0xF236 5308 bytes
font_02_sfnt_off0001045c.bin
2b457b8e38484ece20020577d12b2dd8b64ec30621cf60e3cc95be0baa698f88
pdf-font-stream PDF embedded font (sfnt) at offset 0x1045C 10196 bytes