Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bc806bcf995e50f…

MALICIOUS

PDF

48.1 KB Created: 2020-08-21 08:47:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 123b57ffbc5f6bdee7d3ef61114e5a84 SHA-1: 59701c08ffd5b35efb8505952d657cf5f3a002ac SHA-256: 4bc806bcf995e50f11ec791384083aeba1eb90c439edf121f11033eda99fbf71
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link farm pointing to a malicious redirector. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=free++mp4+asmaul+husna+anak'. While no scripts were extracted, the structure and numerous links suggest a phishing or redirection attempt to deliver a malicious payload.

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=free++mp4+asmaul+husna+anak
    • http://files.theroundhousefarm.com/uploads/1/3/0/7/130775191/zufud.pdf
    • http://files.endgamefit.com/uploads/1/3/2/7/132712000/pumadujedowi-zavixawirepub.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/sidiboxer.pdf
    • https://cdn.shopify.com/s/files/1/0432/0319/9138/files/alarma_viper_7145v_manual_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0429/2172/2015/files/88287201157.pdf
    • https://cdn.shopify.com/s/files/1/0431/0227/3703/files/95799237823.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4897/files/telegikeve.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/vipidifatiserivitofafo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6056/0025/files/51715384657.pdf
    • https://cdn.shopify.com/s/files/1/0431/3704/0538/files/introductory_statistics_gould.pdf
    • https://cdn.shopify.com/s/files/1/0428/5969/2191/files/how_to_delete_emails_in_bulk.pdf
    • https://cdn.shopify.com/s/files/1/0431/1272/6677/files/23598622357.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xanixiki.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000899e.bin
7953561b0705b95ad0984546bf09122d8ed9b6aeab234aa635e20c7d58ad2f39		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x899E 17796 bytes
font_00_sfnt_off00005719.bin
fd7e05016e3df4f96777d922ed982a800bee8ca5da5c310da9f727ca6fb35074		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5719 4808 bytes
font_01_sfnt_off0000672c.bin
258f7537c3aa5cd42410926df9336537cbd2a247e5aac607a61e4d7fcb3c4a63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x672C 10084 bytes
font_03_sfnt_off0000a49d.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA49D 4324 bytes

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