Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc0e80976a14dcce…

MALICIOUS

PDF

45.7 KB Created: 2020-08-30 03:25:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d65312461d96f57f70d6988d0afdba61 SHA-1: 9912f0d8f40b39127d64c8ac5e544a80f5983df8 SHA-256: bc0e80976a14dcce95069ae863a9eff1e6a43a41c832f1f0d7b2387e7dfda9d1
152 Risk Score

Malware Insights

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

The PDF contains embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Ashampoo burning studio 2010 product' and a URL, suggesting a lure to trick users into clicking the malicious link. The presence of a link farm further indicates a malicious intent to distribute content or redirect users. The ML classifier strongly supports the malicious verdict.

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.link/wix?keyword=ashampoo+burning+studio+2010+product
    • https://cdn.shopify.com/s/files/1/0439/7488/5534/files/cervicogenic_headache_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0437/6802/1141/files/74710898568.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mipin.pdf
    • https://cdn.shopify.com/s/files/1/0437/8440/5153/files/index_function_google_sheets.pdf
    • https://static.usrfiles.com/ugd/b8c837_d824dd26c0dd4b38ba26063f9bb9d10e.pdf
    • https://static.usrfiles.com/ugd/b8c837_7fc9513cd8a3429c960734aaf5d32b0b.pdf
    • https://static.usrfiles.com/ugd/e5a943_df5afea651f746dbb93803ee0a7bd15e.pdf
    • https://cdn.shopify.com/s/files/1/0432/0991/6576/files/backup_android_rom_to_sd_card.pdf
    • https://cdn.shopify.com/s/files/1/0434/6865/2697/files/ielts_reading_sample_test.pdf
    • https://cdn.shopify.com/s/files/1/0441/2011/3304/files/free_haccp_plan_template_uk.pdf
    • https://static.usrfiles.com/ugd/238140_3495425991e045bbbca57f91e3c49105.pdf
    • https://static.usrfiles.com/ugd/b8c837_15e2403becef4676ae52a0c0f743d93c.pdf
    • https://static.usrfiles.com/ugd/a44510_20fd032fa88b438a856027fbfeb2280d.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_off00006de1.bin
afedea84565d07cc1088af6d6f21742dd379a764db1e4fb7cf5a5eae067fca61
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE1 5908 bytes
font_01_sfnt_off000081cb.bin
7ba1ea7db312af3c8b7f0941009b1b713dbb2a2614aac3a432ed050652105bd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x81CB 11976 bytes