Malicious PDF — malware analysis report

Static analysis result for SHA-256 346ce2d149e87c61…

MALICIOUS

PDF

42.0 KB Created: 2020-08-06 10:40:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 590ec335c3363a0a42a1e1a1990dd347 SHA-1: a2e1076969a2746d3235cdafb749e24390752503 SHA-256: 346ce2d149e87c617579115b56ae26d7613e47d6f048c9f78baf72dfc7e4fc59
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=alumno+definicion+pedagogica+pdf' which is likely intended to redirect the user to a malicious site. Another heuristic indicates a PDF link farm, suggesting a tactic to increase visibility or distribute malicious content.

Heuristics 3

  • 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.
  • 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=alumno+definicion+pedagogica+pdf
    • http://files.postmarkrecords.com/uploads/1/3/1/4/131483423/gubusidolises.pdf
    • http://files.eddefenseleague.org/uploads/1/3/1/8/131856492/doneronetidap_titaw.pdf
    • http://files.connoisseurstours.com/uploads/1/3/1/8/131857071/abaa266e7dc9a.pdf
    • https://cdn.shopify.com/s/files/1/0428/1391/5303/files/sexurojifuxuvonize.pdf
    • https://cdn.shopify.com/s/files/1/0436/3105/0915/files/56789068247.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ziwodukujaluladiludu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6237/0210/files/reseku.pdf
    • https://cdn.shopify.com/s/files/1/0431/6862/8892/files/98978185068.pdf
    • https://cdn.shopify.com/s/files/1/0428/9291/8937/files/42576635151.pdf
    • https://cdn.shopify.com/s/files/1/0432/1961/5901/files/persona_3_juzumaru.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jujirufevob.pdf
    • https://cdn.shopify.com/s/files/1/0431/1449/6161/files/jurnal_psikologi_budaya_organisasi.pdf
    • https://cdn.shopify.com/s/files/1/0448/9058/7291/files/awk_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kumug.pdf
    • https://cdn.shopify.com/s/files/1/0429/8525/9159/files/tivejesadezo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1057/9865/files/kudire.pdf
    • https://cdn.shopify.com/s/files/1/0437/6556/3549/files/encantadora_de_bebs_livro.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_off000066fb.bin
4aef7b55598a6c2f8055a691ee7150d777ac8ba855f28b89cc3afaa60426e342		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66FB 5192 bytes
font_01_sfnt_off0000789c.bin
cce674cd6f3e294054d17a260d3d5d0f56aa904f639906b2e1d49f3b1afcd6d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x789C 10160 bytes

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