Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c377ce14005e22a…

MALICIOUS

PDF

32.8 KB Created: 2020-08-23 16:13:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6f26998cdd058b1e092bb6f41fb84cf SHA-1: d99561e9a4621aba65f1ace189f6cf484cdc9e33 SHA-256: 1c377ce14005e22a061b2b8f0a80dd614474724d9092e1f63ecf0dba3a43df58
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical redirector link to 'ttraff.cc'. The document body, though partially corrupted, contains the same URL, suggesting it's the primary lure. The heuristic firings indicate the PDF is designed as a link farm pointing to malicious infrastructure. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=eyeglasses+eps+vector+free
    • http://zelapiw.irtliveblog.com/uploads/1/3/0/8/130814297/5702304.pdf
    • http://files.wolfeforgoodenergypud.com/uploads/1/3/0/7/130738960/dijedikob-wolinu-kasiniwakumek-wifimunevuwisid.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62894204366.pdf
    • https://cdn.shopify.com/s/files/1/0436/0133/0340/files/sajawozowagudawaxajafuf.pdf
    • https://cdn.shopify.com/s/files/1/0429/9191/1066/files/37194344191.pdf
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/typeerror__str_object_is_not_callable.pdf
    • https://cdn.shopify.com/s/files/1/0427/9658/1020/files/pearson_test_of_english_academic_practice_tests_plus.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/nupobe.pdf
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/97597648409.pdf
    • https://cdn.shopify.com/s/files/1/0434/2936/3878/files/81424830242.pdf
    • https://cdn.shopify.com/s/files/1/0433/0346/9221/files/95957330819.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8573/files/new_bodo_video_song_2017.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_off00004664.bin
27016bb6a6ec48084889c145785756f2014a9e6dca9fb282f4b078e7bf9cb83d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4664 5304 bytes
font_01_sfnt_off00005893.bin
309566684bd87dc6cdde160e07111378f47b4ae98f90a349cd1e97abd4fc1cad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5893 8892 bytes

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