Malicious PDF — malware analysis report

Static analysis result for SHA-256 77b5fcb29c50a31e…

MALICIOUS

PDF

46.4 KB Created: 2020-09-10 02:50:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80a69e1353a4c0c5ea0f6dec1c3b6566 SHA-1: d4e81fcac6c66346a692545850ce37c725468047 SHA-256: 77b5fcb29c50a31e6d230c2d53528fbea65d8fe647a0c4e5dc804d550e6e8ced
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with a critical heuristic firing indicating a malicious redirector link to 'https://ttraff.me/wix?keyword=capitalismo+comunismo+y+socialismo+pdf'. Another critical heuristic identified a PDF link farm, suggesting a broad distribution attempt. The document body, though heavily obfuscated, contains fragments that appear to be related to the topic mentioned in the URL, reinforcing the lure. No scripts were extracted, but the presence of malicious redirectors strongly suggests an intent to lead the user to a harmful destination.

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.me/wix?keyword=capitalismo+comunismo+y+socialismo+pdf
    • http://vovigog.riverglennkennels.com/uploads/1/3/1/4/131454215/nixezexirazezib.pdf
    • http://zuxes.emilyrochford.com/uploads/1/3/2/3/132302984/punizuletapal-vimomosipafe-nubopexije-livewadop.pdf
    • http://files.isabellefournet.com/uploads/1/3/1/6/131606397/zimeziwob.pdf
    • http://files.ecc-wgpc.org/uploads/1/3/1/6/131606346/vovakimevudafeg_vozigexu.pdf
    • https://static.usrfiles.com/ugd/bd5c68_9d1467b0ea414d4ca6a25b272fe1978b.pdf
    • https://static.usrfiles.com/ugd/15cd4d_c82e1bbfa11e4ff3b4a8075add563164.pdf
    • https://static.usrfiles.com/ugd/b5aed9_adfff963f17244a59235968eb6e450db.pdf
    • https://static.usrfiles.com/ugd/1813b3_cc96c2447e1d4f9b9120ea777fe87a47.pdf
    • https://cdn.shopify.com/s/files/1/0435/0600/8216/files/35578634549.pdf
    • https://cdn.shopify.com/s/files/1/0440/6116/3670/files/biology_book_ib.pdf
    • https://cdn.shopify.com/s/files/1/0437/5488/1175/files/89196450946.pdf
    • https://cdn.shopify.com/s/files/1/0434/1104/6556/files/gnc_pro_performance_creatine_monohydrate_5000_review.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7397/files/st_john_the_baptist_westport_ma.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/
    • https://static.usrfiles.com/ugd/15cd4d_c82e1bbfa11e4ff3b4a8075add563164.p

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071e1.bin
77508dc579a8814dfeba11d905f546fa6eb59c0bc6154ca9c93e90b1a11875a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71E1 5212 bytes
font_01_sfnt_off00008394.bin
fc9d28f8b584ae72e9f231a363e720096ff51828b01298f09a374946479c2529		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8394 12076 bytes

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