Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bf09ce33cca1815…

MALICIOUS

PDF

42.3 KB Created: 2020-08-31 18:46:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0d423de540e95c648a86bc2bf71c85e SHA-1: fc6a009849e35dc327a062232dc8c6ef9b488524 SHA-256: 1bf09ce33cca18152013c1a9bec753ef1d15efab926a6c3392227b26f5ffefa2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains embedded links, one of which, 'https://ttraff.com/wix?keyword=beholder+2+apkpure', is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain this URL and references 'beholder 2 apkpure', suggesting a lure to download potentially malicious software. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector URL supports this assessment.

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.com/wix?keyword=beholder+2+apkpure
    • https://cdn.shopify.com/s/files/1/0427/4126/8647/files/60968492370.pdf
    • https://cdn.shopify.com/s/files/1/0430/3591/8489/files/decode_base64_to_android.pdf
    • https://cdn.shopify.com/s/files/1/0440/8731/2536/files/mathematics_extension_2_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0432/2436/7262/files/antakshari_rounds.pdf
    • https://static.usrfiles.com/ugd/57c819_c2860b4fe6704967b1b13b9c3639c023.pdf
    • https://static.usrfiles.com/ugd/79e0dc_bb3f911a8fc544798ce22a7437978352.pdf
    • https://static.usrfiles.com/ugd/735424_650ed4d44b544e7e94ab3e036e084c4c.pdf
    • https://static.usrfiles.com/ugd/2486b5_69a05295e234420bbb49a3991d92c3be.pdf
    • https://static.usrfiles.com/ugd/c33cdb_2e555e24a3c3431191f9fe3bdbec8d0e.pdf
    • https://cdn.shopify.com/s/files/1/0436/9219/5993/files/hallelujah_lyrics_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0430/6790/0061/files/mofebero.pdf
    • https://cdn.shopify.com/s/files/1/0433/3666/3208/files/sigor.pdf
    • https://cdn.shopify.com/s/files/1/0432/5009/0146/files/calculator_programmer_mode_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/8298/1278/files/4832767175.pdf
    • https://cdn.shopify.com/s/files/1/0430/7936/8858/files/chuy_s_menu_nutrition_information.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004dd6.bin
66a8c63a9303712d733159f97fa69596f3f43066f4db2bebf3d92598a0362231		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DD6 7320 bytes
font_01_sfnt_off00006688.bin
2e20a4b8e708667c0514b8a53a45939c97e2c58749f057467589043d0927dd8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6688 5116 bytes
font_02_sfnt_off000077e2.bin
7f00cb2c6c3588f251e573043e326ac3514d57f37f6dcfd169b42bff297abe09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77E2 10916 bytes

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