Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd040b3915e57e62…

MALICIOUS

PDF

34.7 KB Created: 2020-08-19 11:33:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d374bf633c1732bbe0811323a1fe8d6d SHA-1: dafd43f4ce9a36499cfa86351089b77adbcf053f SHA-256: fd040b3915e57e62f006f6aa8df0dede8adba7d6dc50688b904c142bd81353a7
92 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'ttraff.com'. The document body, though heavily obfuscated, appears to contain this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.com/pify?keyword=tripadvisor+budapest+tour+guides
    • http://files.thealbertafloodroseproject.com/uploads/1/3/1/0/131070718/1d0b1d80c81a4.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/46989312288.pdf
    • https://cdn.shopify.com/s/files/1/0432/8187/5104/files/canadian_infrastructure_report_card.pdf
    • https://cdn.shopify.com/s/files/1/0440/5451/1766/files/merge_command_line.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kovogosiwe.pdf
    • https://cdn.shopify.com/s/files/1/0438/6367/0939/files/27181897752.pdf
    • https://cdn.shopify.com/s/files/1/0439/7118/2750/files/nivojurilodedifipow.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/66184128166.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_off000048b6.bin
9a8967cb4ca8f7f026d2a7b0630cfe20f601b22bfc303fb83e519e8da3f38e59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48B6 5244 bytes
font_01_sfnt_off00005a9d.bin
18abed04cc7cc10932db1c564ebeea51e7078553b7231b9350eb5dc332a0c856		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A9D 10592 bytes

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