Malicious PDF — malware analysis report

Static analysis result for SHA-256 409eaf04567b013b…

MALICIOUS

PDF

55.4 KB Created: 2020-08-20 03:24:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19802e70fcdcc3e1c44ac4a44d9a1704 SHA-1: 98a2a29e065fa710489a12575c53135a49f9def0 SHA-256: 409eaf04567b013bec06b1d064d9c876ecc6c9f2466f6fd3d917da102512b230
152 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to what appears to be a link farm designed for SEO manipulation. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=hit+the+road+jack+sheet+music'. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to the malicious URL and benign-looking PDF filenames, suggesting a lure to disguise the malicious redirection.

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/pify?keyword=hit+the+road+jack+sheet+music
    • http://gaketamun.painfog.com/uploads/1/3/0/8/130874493/60640be22185.pdf
    • http://files.hightechtintplus.com/uploads/1/3/2/3/132302973/47aff28564.pdf
    • http://wofog.29wildcats.com/uploads/1/3/2/8/132814930/d6dbc7f2b9024.pdf
    • http://files.sacredheartadams.org/uploads/1/3/1/1/131164387/1862954.pdf
    • https://cdn.shopify.com/s/files/1/0431/5286/7494/files/gesakugejarimemitom.pdf
    • https://cdn.shopify.com/s/files/1/0434/1671/5429/files/jalofisexe.pdf
    • https://cdn.shopify.com/s/files/1/0437/5917/3790/files/zokatezarilakemekefubavaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/8760/9497/files/destiny_2_forsaken_imdb.pdf
    • https://cdn.shopify.com/s/files/1/0430/8723/3173/files/pdf_file_for_pc_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0429/9482/7415/files/safe_electric_logo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0357/6481/files/dimaro.pdf
    • https://cdn.shopify.com/s/files/1/0432/7777/9100/files/roveruwaxakarawejare.pdf
    • https://cdn.shopify.com/s/files/1/0437/8751/8104/files/nelutar.pdf
    • https://cdn.shopify.com/s/files/1/0435/2707/8052/files/teste_de_assertividade.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_off00007eb0.bin
c3dd73a9ab25b98bb046f38c7743eca390e13cefab38735619906ebfc3f297ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EB0 4540 bytes
font_01_sfnt_off00008e6c.bin
c3b1268ea2f9ffcbde56c4b4fe049b2cdde6a91bb7fe5e24152ff9a4e9f8ae1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E6C 5248 bytes
font_02_sfnt_off0000a017.bin
ee9f25720fca23d6544ce63370222d2ad98323b789155e311eea223924011399		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA017 15520 bytes

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