Malicious PDF — malware analysis report

Static analysis result for SHA-256 18fb9c48aa87dcf5…

MALICIOUS

PDF

69.4 KB Created: 2020-08-18 20:19:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6aec8d09af38f9eb66c63cedc499130c SHA-1: 21e3cfee1ef908c69ff7eb3b23c0f30c4e91d5d7 SHA-256: 18fb9c48aa87dcf5868e4a7381c15281e7ecdbb2fe20e949e9d9a3bb34811c69
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many of which point to a link farm hosted on Shopify. One of these links, https://ttraff.cc/pify?keyword=definition+of+contemplated, is identified as a malicious redirector. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for phishing or malware distribution. No scripts were extracted, and the document body is largely unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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=definition+of+contemplated
    • http://files.rockfishdesigns.com/uploads/1/3/1/4/131483143/f6536d19.pdf
    • http://files.jonathancaverley.com/uploads/1/3/0/9/130969993/wibivev.pdf
    • http://files.pageantsbymindy.com/uploads/1/3/1/4/131438058/8f531821.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://www.opentle.org
    • https://cdn.shopify.com/s/files/1/0438/5511/8501/files/najagewokubuwigav.pdf
    • https://cdn.shopify.com/s/files/1/0437/1664/0917/files/jojesiseji.pdf
    • https://cdn.shopify.com/s/files/1/0432/2204/0731/files/minutedolosivu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7046/3912/files/stardew_valley_spring_crops_bundle.pdf
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/zizowugebuwakiporu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1068/6113/files/94025522623.pdf
    • https://cdn.shopify.com/s/files/1/0432/8561/0651/files/auditoria_financiera_forense.pdf
    • https://cdn.shopify.com/s/files/1/0434/7042/2180/files/pofiwewiluvamizumoj.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 9

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_010_off0000dc64.bin
a868505805417e849af2ad8dfacb1330300bc342d4366d77d1e20aab43efe757		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xDC64 18208 bytes
font_00_sfnt_off00005b52.bin
40ed7a59e93a39a2357a6714e82246a7d8382393c541a7d084f33d2bd6126fa4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B52 5588 bytes
font_01_sfnt_off00006ee2.bin
37576cdbd6903e9668eb54b51f8e326fb9ff655306f3a4b4737bdf5f334043a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE2 5024 bytes
font_02_sfnt_off00007fe7.bin
c206ac4eca120f096112d408dff6b33a2f721090936d80486df636e1cd240fde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE7 2656 bytes
font_03_sfnt_off00008aed.bin
3702365b3034b9d7945da23b991b5e2ac3f8bb06d1ba3be7e5ba1b5d8dd48c9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AED 2328 bytes
font_04_sfnt_off000095a4.bin
e66bd646ff29f48b94a898642357a1d5295b77faffa0bd70eb77acb4aebc9a97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95A4 2108 bytes
font_05_sfnt_off00009f70.bin
eca62b72654736461a635ba366d09d794777fd95c58152d2b251becdfce657e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F70 6640 bytes
font_06_sfnt_off0000b10d.bin
a2f12002f5462bcf544cf42c54dc00fa2fd9c448a6c24b19d5c1e15214327376		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB10D 12964 bytes
font_08_sfnt_off0000f955.bin
51c1d5fa29146058fbc649eac7766b85490f6942bd67486bd14cc46e9087474c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF955 3276 bytes

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