Malicious PDF — malware analysis report

Static analysis result for SHA-256 68d86a76b7d938dc…

MALICIOUS

PDF

50.1 KB Created: 2020-08-13 23:07:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67791d8604ecfd7e674232fddb022bc1 SHA-1: c276f60b4e4b5af456179336f89740dffa54aeef SHA-256: 68d86a76b7d938dc2b6660e28ef2a831a6cdc937ff988caca8b1b490d906a0c0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to potentially malicious or suspicious domains. The primary malicious URL identified is a redirector, suggesting an attempt to obscure the final destination. The document body, though heavily obfuscated, contains references to the malicious URL and benign-looking PDF links, indicating a lure to external 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.com/pify?keyword=gana+achu+sari+sari+song
    • http://zobazelep.tessagoss.com/uploads/1/3/0/8/130814252/686287.pdf
    • http://files.megabonlux.com/uploads/1/3/1/4/131437295/mizigegujebufizoduz.pdf
    • http://gosomibix.fibromyalgiamadesimple.com/uploads/1/3/1/8/131856177/1526129.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0429/4954/2041/files/49202454279.pdf
    • https://cdn.shopify.com/s/files/1/0431/2953/6676/files/buyer_decision_making_process.pdf
    • https://cdn.shopify.com/s/files/1/0430/8592/2466/files/92976578398.pdf
    • https://cdn.shopify.com/s/files/1/0431/4336/4759/files/34715755554.pdf
    • https://cdn.shopify.com/s/files/1/0430/5272/8474/files/barzanji_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/3557/4943/files/3597411485.pdf
    • https://cdn.shopify.com/s/files/1/0439/3923/3960/files/1099180610.pdf
    • https://cdn.shopify.com/s/files/1/0440/0644/1110/files/amenagement_du_territoire_au_mali.pdf
    • https://cdn.shopify.com/s/files/1/0441/2217/7688/files/materi_biologi_sel_sma.pdf
    • https://cdn.shopify.com/s/files/1/0428/5366/2883/files/fractions_adding_and_subtracting_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/5038/5051/files/vorediti.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jisabisagubimebusogapasof.pdf
    • https://cdn.shopify.com/s/files/1/0428/0470/7491/files/42224440458.pdf
    • https://cdn.shopify.com/s/files/1/0430/8949/4177/files/dimawiwezuwibitadumexuz.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072c4.bin
53247d72076de12dfee531152e4b66ef1f04722c36ce6912adf45d2aeecfdf98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72C4 5060 bytes
font_01_sfnt_off000083ef.bin
11634037c6fd080fdd41aabed5ad7f5c6a6ca4c7a86ffc075fd698fb9945f635		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83EF 2412 bytes
font_02_sfnt_off00008e8b.bin
c35a20592d0048f01f82d31c31c72a34ee3ee5cffd3626519c6143fcc6202c04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E8B 14024 bytes

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