Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab586e84dbac9f1f…

MALICIOUS

PDF

55.0 KB Created: 2020-09-02 10:09:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db3185afc3311fde92f94bd3e1072fba SHA-1: cea88ebe9ce53e261e6094612f41bbb825107e3c SHA-256: ab586e84dbac9f1fccd21297599e24f4cbd9841653279ceff10c2d642fc488b9
152 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its inclusion of a link farm containing numerous external links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/wix?keyword=like+magic+video+maker+app+apk', which is a primary indicator of malicious intent. The presence of multiple PDF links suggests an attempt to broaden the attack surface or distribute further malicious content.

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/wix?keyword=like+magic+video+maker+app+apk
    • https://static.usrfiles.com/ugd/b8c837_18265e94900b4167b902552d99d99751.pdf
    • https://static.usrfiles.com/ugd/3dd68e_257a5d68f0904c3dbf6772fef4596ff9.pdf
    • https://static.usrfiles.com/ugd/c162b3_99b7425ad135416e92801244a27fe331.pdf
    • https://static.usrfiles.com/ugd/cdb50c_139bf1c9cc674284aa061286b05d861e.pdf
    • https://static.usrfiles.com/ugd/88a84f_faecc43f01a84116ad82654d1f9f96de.pdf
    • https://static.usrfiles.com/ugd/5899d5_ecdc9c4ad7e04b4a969e901f6b1e240d.pdf
    • https://static.usrfiles.com/ugd/73cb9e_36a4a54cf3ca46598c3a19a411cfc806.pdf
    • https://cdn.shopify.com/s/files/1/0434/0937/5383/files/57328527236.pdf
    • https://cdn.shopify.com/s/files/1/0435/7252/7267/files/maxifusali.pdf
    • https://cdn.shopify.com/s/files/1/0428/2476/1507/files/78791498037.pdf
    • https://cdn.shopify.com/s/files/1/0434/7432/1560/files/bengali_folk_song_mr_jatt.pdf
    • https://cdn.shopify.com/s/files/1/0446/1504/1187/files/chronological_bible_study_guide.pdf
    • https://static.usrfiles.com/ugd/b6bf5b_ead54af3326c40288ca319ba629c059f.pdf
    • https://static.usrfiles.com/ugd/b8c837_e882580aa40b4d8d87df7d097397f890.pdf
    • https://static.usrfiles.com/ugd/b8c837_de4e80c054064e80a40c774c694587f4.pdf
    • https://static.usrfiles.com/ugd/ba3095_79c22d13fc9942a391fdd68fc824bdd8.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007799.bin
ac64b8af80fcca1e0e594fba8a0f1e66fdecb42d42f059741c9e9f76428d751e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7799 2880 bytes
font_01_sfnt_off000081d8.bin
8d0ea5de84ffce7b223561b2cc7dbf850888c62772ca77e2410e0c68e07cbfaf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81D8 5248 bytes
font_02_sfnt_off000093ab.bin
11a235f0fae8480b831f2771ca58591775337cbe77977d6e89cbe31c7df10593		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93AB 9980 bytes
font_03_sfnt_off0000b620.bin
ad9328d112efc140d3f5235d0121cf1c9d58744adca6ce4d3feead3bf5fd2aef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB620 16856 bytes

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