Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae5cceb859703afd…

MALICIOUS

PDF

48.8 KB Created: 2020-08-30 08:52:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d3abbe6c180ef5d50877e092ccf2c78 SHA-1: ac8c53c9034301997555720a2946b507fe2f9b01 SHA-256: ae5cceb859703afdfbc036d07a888b670c141dbb53cbc02a7e27d016b8cfb6cf
152 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 link to a known malicious redirector at https://ttraff.ru/wix?keyword=amazing+grace+guitar+tabs. The document body, though heavily obfuscated, contains the same lure text and URLs. This indicates the PDF is designed to redirect users to malicious infrastructure, likely for further exploitation or credential harvesting.

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.ru/wix?keyword=amazing+grace+guitar+tabs
    • https://cdn.shopify.com/s/files/1/0435/9897/1038/files/sojanenimorila.pdf
    • https://cdn.shopify.com/s/files/1/0427/4470/9276/files/33034963112.pdf
    • https://cdn.shopify.com/s/files/1/0430/3680/3233/files/vilunanoxefepokegav.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/77623390752.pdf
    • https://cdn.shopify.com/s/files/1/0430/5027/0869/files/91810021149.pdf
    • https://cdn.shopify.com/s/files/1/0440/9825/7048/files/wetipunikevoza.pdf
    • https://cdn.shopify.com/s/files/1/0427/3537/0407/files/.pdf
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/babycakes_donut_maker.pdf
    • https://cdn.shopify.com/s/files/1/0435/5099/8679/files/acordes_de_canciones_guitarra.pdf
    • https://cdn.shopify.com/s/files/1/0448/1181/3015/files/carcinoid_syndrome_diet.pdf
    • https://cdn.shopify.com/s/files/1/0440/6745/5128/files/gta_5_mods_ps3_usb.pdf
    • https://cdn.shopify.com/s/files/1/0433/6690/8054/files/70002933325.pdf
    • https://cdn.shopify.com/s/files/1/0432/2436/7262/files/lisozu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/55288460854.pdf
    • https://cdn.shopify.com/s/files/1/0437/6743/1329/files/lobisezitevij.pdf
    • https://cdn.shopify.com/s/files/1/0433/9371/2286/files/31867759710.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
stream_006_off00009a74.bin
ac764829c0860bcd40aadb4899376fd978cd5207a55bb9b471a666e4f3a93b1d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9A74 17916 bytes
font_00_sfnt_off00006548.bin
afd1a8db3a4c68b119e32338dcf45ee257277baaed46d79ff86cd3b85131e134		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6548 5268 bytes
font_01_sfnt_off00007712.bin
1d1552018972eb4a3ec84ec9a24eddeea0fbdeff31adbad45b33f51dcc291df1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7712 10352 bytes

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