Malicious PDF — malware analysis report

Static analysis result for SHA-256 bea553ad7bfe9db2…

MALICIOUS

PDF

42.7 KB Created: 2020-08-05 12:57:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a07d5fc65118087d3a2799c70a51faf SHA-1: dd634cdea57cc2f2bbdb5cd852bcd587277181a9 SHA-256: bea553ad7bfe9db23cb8abc44338d96920d21b7db72169b2f0eea4855d45a829
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that points to ttraff.ru, a known malicious domain. The document body, though heavily obfuscated, contains text related to 'information about gst pdf' and also includes the malicious URL. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to distribute the malicious content. The heuristic 'SE_INVOICE_LURE' further supports the idea that the document is designed to trick the user into clicking the link.

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.
  • 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.ru/pify?keyword=information+about+gst+pdf
    • http://jipoz.correctyourconcrete.com/uploads/1/3/0/7/130738720/6972097.pdf
    • http://files.bearpak.org/uploads/1/3/1/3/131383743/jelufa_dajizuko_dokerogobusowaz_kotagerezu.pdf
    • http://files.mediagearpro.com/uploads/1/3/2/8/132814415/3912109.pdf
    • http://files.birthandplacentas.com/uploads/1/3/2/7/132712661/2441691.pdf
    • http://files.theapsara.com/uploads/1/3/1/6/131606193/torobakuwofivum.pdf
    • https://cdn.shopify.com/s/files/1/0433/5442/3464/files/circular_motion_experiment.pdf
    • https://cdn.shopify.com/s/files/1/0429/8113/0394/files/gifizulasajaxekivokorenis.pdf
    • https://cdn.shopify.com/s/files/1/0431/4107/1016/files/keruvovuru.pdf
    • https://cdn.shopify.com/s/files/1/0432/2535/0301/files/vopabewone.pdf
    • https://cdn.shopify.com/s/files/1/0430/8995/2922/files/30809340078.pdf
    • https://cdn.shopify.com/s/files/1/0431/4624/8358/files/4162200435.pdf
    • https://cdn.shopify.com/s/files/1/0435/9254/8511/files/56205250078.pdf
    • https://cdn.shopify.com/s/files/1/0438/2257/9869/files/rifts_rpg_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/2663/5157/files/17792972768.pdf
    • https://cdn.shopify.com/s/files/1/0430/9899/6889/files/mekimejasalepel.pdf
    • https://cdn.shopify.com/s/files/1/0429/0471/5427/files/jawupudaxunog.pdf
    • https://cdn.shopify.com/s/files/1/0432/2073/0011/files/jirovuwegugugo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0896/6307/files/dulatarigibodeb.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_off00006910.bin
a61bb0d09c502df1bb58ebac38d6b5d1b15666054cdfd86dfa2ba3b11205359c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6910 5404 bytes
font_01_sfnt_off00007b55.bin
94e50c1a7360a415e8f01fdc75a3da3cf3fbd7c9bda2425fcc96acde66bcc934
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B55 10188 bytes