Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f2de577c981c1d5…

MALICIOUS

PDF

39.2 KB Created: 2020-08-23 10:58:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ccc6e02f2c239d78e7303fb6fbd61696 SHA-1: b10b7d5afdec18de5fec43baff735cb98122c9a1 SHA-256: 9f2de577c981c1d5fa0d64806834b2b25c3187f03e516f2a06bd2b86849b915f
92 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body text, though heavily obfuscated, contains references to 'Adobe premiere elements free templates' and the malicious URL, suggesting a lure to download potentially malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of a malicious redirector and the lure content point to a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.cc/pify?keyword=adobe+premiere+elements+free+templates
    • http://sudunesa.thequestofjz.com/uploads/1/3/0/8/130814229/koninoxawibipop_bakukarelema_sukadawilex_bipadozebozoga.pdf
    • http://files.artisfine.com/uploads/1/3/1/3/131380052/63afaa37.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3135/files/programmable_metronome_app_android.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/brown_bear_story.pdf
    • https://cdn.shopify.com/s/files/1/0428/7778/0134/files/biology_11th_class_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/5824/9376/files/49965645129.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9870/files/mikadatunowegedasotevexam.pdf
    • https://cdn.shopify.com/s/files/1/0430/2969/2577/files/37680583716.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5018/files/vonitoju.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_off00005c18.bin
a46d55c2809bceb146ea42b7929628277bc492c89e458dbcf433e4032f29b885		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C18 5316 bytes
font_01_sfnt_off00006e07.bin
466f50f5661d760a4ba630709a7e6aab8d12745a2286a3cf6e990e6934ce06d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E07 10024 bytes

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