Malicious PDF — malware analysis report

Static analysis result for SHA-256 c33eeb2a52fa6c8c…

MALICIOUS

PDF

42.7 KB Created: 2020-08-16 00:41:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dabf3bc451cd34398bc112c38661e733 SHA-1: 06d69b9f79b06ec26af0876b2ae6a6796c6da7ec SHA-256: c33eeb2a52fa6c8c4381ccaf5cb25c4af257c9549887e59072a5b8f22dc41fb7
152 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a known malicious URL, disguised with a keyword related to Cisco Webex. This indicates a phishing or social engineering attempt to lure the user to a malicious site. The PDF also contains a large number of external links, many pointing to Shopify, suggesting a link farm or SEO poisoning tactic to improve search engine ranking for malicious content. No scripts were extracted from this sample.

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=cisco+webex+room+kit+pro+data+sheet
    • http://files.hardtranch.com/uploads/1/3/0/7/130776542/somotegewuxo_futomuzomewizu_ripafodekulez_lepizomejezun.pdf
    • https://cdn.shopify.com/s/files/1/0446/5026/6787/files/adobe_animate_cc_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0432/7741/8651/files/71786050789.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/55378763690.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/25039627364.pdf
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/25967201306.pdf
    • https://cdn.shopify.com/s/files/1/0437/3980/7893/files/french_lessons_for_beginners_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/9236/8798/files/moxerigugomiwavipika.pdf
    • https://cdn.shopify.com/s/files/1/0432/6014/9910/files/adt_alarm_manual.pdf
    • https://cdn.shopify.com/s/files/1/0445/3515/2804/files/homelite_weed_eater_parts.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78683638278.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kafojisiguzisov.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_off000066fb.bin
6d3a6a53ebbcfe4aaea3c17a350644e406b7c02d1bc07c947ba7dee0ae87384b
pdf-font-stream PDF embedded font (sfnt) at offset 0x66FB 5548 bytes
font_01_sfnt_off000079b9.bin
47574a2f9cbdd912ba082b37b32e4110558ecaf1bb9beccc64a2b81b6f9a3fbd
pdf-font-stream PDF embedded font (sfnt) at offset 0x79B9 10792 bytes