Malicious PDF — malware analysis report

Static analysis result for SHA-256 f063fd5f4212a537…

MALICIOUS

PDF

40.6 KB Created: 2020-08-18 21:11:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0dcb3bd7eae2bdc5a78cef6fd91d6ceb SHA-1: fcec9414dce6b750bdd088b9228c3111837e46dc SHA-256: f063fd5f4212a537568f493bf270eaebc9dbdf3385541391b388e32f08639083
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body also contains this URL, presented as a link for 'portfolio templates for designers'. This indicates a social engineering lure to trick users into visiting a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious.

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=portfolio+templates+for+designers
    • http://files.worldfestivaloftrees.org/uploads/1/3/0/7/130775371/sufizanewizevej-remewan.pdf
    • https://cdn.shopify.com/s/files/1/0447/3965/7879/files/core_java_syllabus_durgasoft.pdf
    • https://cdn.shopify.com/s/files/1/0433/4655/9127/files/star_wars_the_force_unleashed_cheat_codes.pdf
    • https://cdn.shopify.com/s/files/1/0434/6658/8325/files/60360272344.pdf
    • https://cdn.shopify.com/s/files/1/0431/8268/6367/files/jiguxa.pdf
    • https://cdn.shopify.com/s/files/1/0439/8202/8958/files/goalkeeper_training_drills.pdf
    • https://cdn.shopify.com/s/files/1/0432/6083/8050/files/zomorelikorinoxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8259/6004/files/89545458088.pdf
    • https://cdn.shopify.com/s/files/1/0430/9486/8122/files/68552522006.pdf
    • https://cdn.shopify.com/s/files/1/0435/5981/3279/files/lesomadot.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/71185303235.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_off000062cd.bin
3b955dfef034ef8168558f2dba0d78467306e22f19ff66a1e415f22264699f00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62CD 5360 bytes
font_01_sfnt_off000074e6.bin
64849f116635b4ba0ac73950bebf32c05c1a5707b7197ce937e0a34fc9ae72e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74E6 9744 bytes

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