Malicious PDF — malware analysis report

Static analysis result for SHA-256 afc464781ea7aa4e…

MALICIOUS

PDF

75.4 KB Created: 2020-08-09 15:13:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4eb385f0658d28fe487d679e05c5d98 SHA-1: 3d278abc43264f90b54b3713852fff83d5394775 SHA-256: afc464781ea7aa4eb10d0d6dd96c1afc204e12b26c4442c56f750ce380b39544
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=aparato+digestivo+para+colorear+pdf'. It also contains a PDF link farm heuristic, indicating a large number of external links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same redirector URL. The primary attack pattern is to lure users to malicious infrastructure via a seemingly benign document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.com/pify?keyword=aparato+digestivo+para+colorear+pdf
    • http://zekekuda.sebaacademyschool.com/uploads/1/3/0/8/130874284/ade742117b0426.pdf
    • http://files.my-mediamatters.tech/uploads/1/3/2/7/132740435/6028230.pdf
    • http://sesonu.pinchaschemsite.com/uploads/1/3/0/8/130874218/mexopa.pdf
    • http://nemiv.p4partyproductions.com/uploads/1/3/0/9/130969332/8343391.pdf
    • https://cdn.shopify.com/s/files/1/0433/7011/9333/files/tinker_s_tools_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/bukadelejonepazetudir.pdf
    • https://cdn.shopify.com/s/files/1/0436/3390/1726/files/tunogoboxar.pdf
    • https://cdn.shopify.com/s/files/1/0440/8446/1720/files/65265397690.pdf
    • https://cdn.shopify.com/s/files/1/0436/7525/4937/files/iti_fitter_engineering_drawing_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/5730/7039/files/comparison_between_axial_and_centrifugal_compressor.pdf
    • https://cdn.shopify.com/s/files/1/0436/2679/1072/files/cristianismo_y_hecho_religioso_angel_cordovilla.pdf
    • https://cdn.shopify.com/s/files/1/0428/4104/7206/files/pixefufesif.pdf
    • https://cdn.shopify.com/s/files/1/0436/1325/7885/files/seropuxavunese.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rikakaxudote.pdf
    • https://cdn.shopify.com/s/files/1/0431/8976/4245/files/articulations_a_unlv_rhetoric_and_reader.pdf
    • https://cdn.shopify.com/s/files/1/0434/1995/9463/files/persuasive_essay_topics_for_middle_school.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72518400380.pdf
    • https://cdn.shopify.com/s/files/1/0431/0610/7552/files/wegeselabodamabivote.pdf
    • https://cdn.shopify.com/s/files/1/0435/8383/2227/files/yamaha_fascino_specifications.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b933.bin
0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB933 6744 bytes
font_01_sfnt_off0000ca1a.bin
ddcc1a958d42f15c0119b995440ef5ca192d727c529d3b593fc88c62cf4f018c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA1A 5052 bytes
font_02_sfnt_off0000db61.bin
d4472bdb3d3b1d7245cf94cf37bd58fc633ad4b0176b689b3a6c81274a74195b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB61 3352 bytes
font_03_sfnt_off0000e8b2.bin
022cfdba5bc817b4f84f9519f38be02fb63ab1153478573cbb84f3aca7edf1bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B2 11796 bytes
font_04_sfnt_off00010f35.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F35 4324 bytes

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