Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf3d9144f335d5a3…

MALICIOUS

PDF

44.4 KB Created: 2020-08-29 21:14:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0cd0cbb4cde02bdbb3627d94a665294 SHA-1: e68e6951eb61555f0b993e7d66ac5eccc98fedda SHA-256: cf3d9144f335d5a3d9ae882308b4bdbefe11c0496f4b0eab3619d5c2ddcac25a
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=grade+arm%25C3%25A9e+de+terre+salaire'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including 'https://cdn.shopify.com/s/files/1/0433/9774/2750/files/european_society_of_cardiology_guidelines_pregnancy.pdf'. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL and other links, suggesting a lure to a malicious site.

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=grade+arm%25C3%25A9e+de+terre+salaire
    • https://cdn.shopify.com/s/files/1/0433/9774/2750/files/european_society_of_cardiology_guidelines_pregnancy.pdf
    • https://cdn.shopify.com/s/files/1/0445/9751/0308/files/sensory_processing_disorder_checklist_adults.pdf
    • https://cdn.shopify.com/s/files/1/0427/5997/9174/files/random_dating_chat_apk.pdf
    • https://static.usrfiles.com/ugd/e3c460_8247489184984bf1bcfb92a8858ce32d.pdf
    • https://static.usrfiles.com/ugd/ca300b_5adb672b43de4a819247c33198849fb5.pdf
    • https://cdn.shopify.com/s/files/1/0437/5019/5354/files/35655875524.pdf
    • https://cdn.shopify.com/s/files/1/0447/9343/0177/files/la_ballata_dell_amore_cieco_spartito.pdf
    • https://cdn.shopify.com/s/files/1/0440/3871/7605/files/76229195981.pdf
    • https://cdn.shopify.com/s/files/1/0440/6758/6213/files/agriculture_file.pdf
    • https://cdn.shopify.com/s/files/1/0437/6231/9518/files/33072643513.pdf
    • https://static.usrfiles.com/ugd/8acad3_4d46b9f4c4dd44e7abcda2e46ea00e7a.pdf
    • https://static.usrfiles.com/ugd/b8c837_28ee1430f79b46dc984a160ba83336f8.pdf
    • https://static.usrfiles.com/ugd/b8c837_58ceaf9a40ba4b67b8b7249bd4a3d290.pdf
    • https://static.usrfiles.com/ugd/b8c837_fec1fbf942ba4a808d1d1c814c909eef.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f4f84a6a05a415fadeb236f94690782.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_off00006307.bin
b18961a76d6e04345449c15333ebd1544dbc62bcab7b241f933c1c56701772ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6307 5144 bytes
font_01_sfnt_off0000742a.bin
32687fad0caba929aaf56c70db7dd4130ec103e6d633496101499fb569f552bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x742A 15640 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.