Malicious PDF — malware analysis report

Static analysis result for SHA-256 a932c4c45eeee798…

MALICIOUS

PDF

43.1 KB Created: 2020-08-03 23:41:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a7c5269e6925de0fa8b260506b6933b SHA-1: 00696beb56551b0b0ed2f820062e1f6b9a5af461 SHA-256: a932c4c45eeee79894959b0fbef8012a15e014900fdb93577e5a214999ac3242
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains and a primary redirector at ttraff.cc. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags the ttraff.cc URL as malicious. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=clases+sociales+en+mexico+pdf, indicating a lure to a malicious site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=clases+sociales+en+mexico+pdf
    • http://files.polebites.com/uploads/1/3/2/6/132695343/a16bddf.pdf
    • http://files.riseup-greencity.org/uploads/1/3/2/8/132816165/zobimirikapuliv_xotap_tuwobe_sotawaxipusev.pdf
    • http://files.bpcslibrary.org/uploads/1/3/1/3/131381602/vajulegamiti-jojewifagade-sufapekukapoti.pdf
    • http://files.broadwaterdragons.com/uploads/1/3/1/3/131380343/fagivakuzilavata.pdf
    • http://zopobo.everlightimagery.com/uploads/1/3/0/7/130739457/ee8f8a7a28413.pdf
    • https://cdn.shopify.com/s/files/1/0435/5689/6927/files/11420168937.pdf
    • https://cdn.shopify.com/s/files/1/0432/4281/5643/files/sin_and_punishment_n64_rom.pdf
    • https://cdn.shopify.com/s/files/1/0436/8482/3205/files/zavibobaniva.pdf
    • https://cdn.shopify.com/s/files/1/0428/6640/9639/files/13528629278.pdf
    • https://cdn.shopify.com/s/files/1/0428/2603/9452/files/zetizuxomixegiketasiji.pdf
    • https://cdn.shopify.com/s/files/1/0437/6051/7274/files/.pdf
    • https://cdn.shopify.com/s/files/1/0431/2114/8061/files/30254973874.pdf
    • https://cdn.shopify.com/s/files/1/0431/4487/2090/files/tegafotezodifi.pdf
    • https://cdn.shopify.com/s/files/1/0436/1525/6738/files/2012_chevy_malibu_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6488/files/dagerovidusejira.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_off0000642b.bin
3ffa85f6de1175b1019182f460b78f2eb5c0563b247f5b32496dbc35701b5429		 pdf-font-stream PDF embedded font (sfnt) at offset 0x642B 5180 bytes
font_01_sfnt_off000075bf.bin
26a4888e6140483b8c56091a8aba653917677e3c13cd7bca128ad1503a3b4db2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75BF 12992 bytes

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