Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a17d6c10d64d111…

MALICIOUS

PDF

50.2 KB Created: 2020-08-24 00:48:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d691a3cf98ac367cca4206090190011 SHA-1: 512325f90e282a1ac5ddecd08a4593629a586dda SHA-256: 0a17d6c10d64d1114fc4b9636959e05de6ffdbb34f0d078b208816c7cf8c8bfa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a link farm designed to host malicious content. One prominent URL, https://ttraff.cc/pify?keyword=rufus+2.+9++filehippo, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other links to PDF files hosted on various domains, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=rufus+2.+9++filehippo
    • http://files.israylcommonwealthministries.org/uploads/1/3/1/3/131384589/xabepakuxabapen.pdf
    • http://files.landscapingtreela.com/uploads/1/3/1/3/131381881/2625983.pdf
    • http://files.cambridgeharriers.com/uploads/1/3/1/4/131483830/92b2d.pdf
    • http://files.wichitafallsbridge.com/uploads/1/3/0/8/130874058/3313912.pdf
    • http://files.solit.studio/uploads/1/3/1/6/131606260/joruk_bodewukejaluwi_zapunufo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0441/2211/2152/files/sesesasazigitiguzisakovob.pdf
    • https://cdn.shopify.com/s/files/1/0430/8706/9348/files/tuvivafelerefis.pdf
    • https://cdn.shopify.com/s/files/1/0436/2996/9561/files/42877306077.pdf
    • https://cdn.shopify.com/s/files/1/0431/0935/1585/files/10507317700.pdf
    • https://cdn.shopify.com/s/files/1/0438/3876/7264/files/dikiweluvovetupidejose.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/pharmaceutical_inorganic_chemistry_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/1903/5033/files/juruxepuludopus.pdf
    • https://cdn.shopify.com/s/files/1/0435/3500/7893/files/67802019039.pdf
    • https://cdn.shopify.com/s/files/1/0429/5580/0739/files/36262465548.pdf
    • https://cdn.shopify.com/s/files/1/0438/2208/8354/files/98223177834.pdf
    • https://cdn.shopify.com/s/files/1/0434/3093/6733/files/saladuvunerup.pdf
    • https://cdn.shopify.com/s/files/1/0432/3193/6674/files/tuketilawofijegomolamefo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8460/3801/files/nugovevobanorubikumito.pdf
    • https://cdn.shopify.com/s/files/1/0428/9980/0217/files/.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069f7.bin
4cb8d2f619af232d43b07e7bb20c963f710c4a9bcdf1f043dccef77bfb45f3c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69F7 4852 bytes
font_01_sfnt_off00007af8.bin
80fd1f709b5ec5f7e9e3801244f95b7e4195b9c3f0b6f2c0e4fc123c011c1b43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF8 4704 bytes
font_02_sfnt_off00008b07.bin
730fb403b1c56c643dac9f06bece24372a990694ba9538420999692f01229492		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B07 9976 bytes
font_03_sfnt_off0000ad29.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD29 4324 bytes

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