Malicious PDF — malware analysis report

Static analysis result for SHA-256 f135ccd7442448a4…

MALICIOUS

PDF

51.7 KB Created: 2020-08-30 06:49:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa46de2c7bb84c0108fb23156a52bafa SHA-1: c9d302cc0341b5a0e9bc1779467a7a779cebe841 SHA-256: f135ccd7442448a4752b67bf37ff0f7b2b480027b8d53bea67adaa0f73e1ee05
152 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, directing users to 'https://ttraff.cc/wix?keyword=peachtree+nova150+review'. This indicates a phishing or social engineering attempt. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious URL is sufficient evidence for this assessment.

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.cc/wix?keyword=peachtree+nova150+review
    • https://static.usrfiles.com/ugd/b8c837_11efaf39fdf346398699d2fd99adfbc7.pdf
    • https://static.usrfiles.com/ugd/b8c837_ffdba306e8c349b2bb3b062d0249fb7e.pdf
    • https://static.usrfiles.com/ugd/b8c837_80b834759d2c4e9b943af6c63b8f4b64.pdf
    • https://static.usrfiles.com/ugd/b8c837_a8d42a2cdc334486ab30289d205be209.pdf
    • https://cdn.shopify.com/s/files/1/0440/7230/4790/files/77232706422.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/messenger_app_for_facebook_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/3463/9522/files/bozavuketow.pdf
    • https://cdn.shopify.com/s/files/1/0431/6564/7012/files/stainless_steel_medieval_2.pdf
    • https://cdn.shopify.com/s/files/1/0432/7263/4533/files/28021222971.pdf
    • https://static.usrfiles.com/ugd/c1108c_22f86ee28f7f42b7bba267379db8b67a.pdf
    • https://static.usrfiles.com/ugd/a44510_8849005d38a9484099b58f655fb567fd.pdf
    • https://cdn.shopify.com/s/files/1/0434/0462/4021/files/dewaluwatoretaregiwenolo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7738/5892/files/53652774977.pdf
    • https://cdn.shopify.com/s/files/1/0434/7386/2821/files/givulemidudilanakawit.pdf
    • https://cdn.shopify.com/s/files/1/0440/9029/4437/files/wild_edible_plants.pdf
    • https://cdn.shopify.com/s/files/1/0428/2174/6854/files/55323477926.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_off00007cce.bin
d7db650cf4c556a4c366765fa434feb1a2f196bd30fec7cbdd9dbc7e5568dac9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CCE 4936 bytes
font_01_sfnt_off00008d9f.bin
33b50fd5b565c23ecf6d20df6e79fba21a4eae9b9ec8332bb328d7868aa51f58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D9F 12012 bytes
font_02_sfnt_off0000b418.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB418 4324 bytes

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