Malicious PDF — malware analysis report

Static analysis result for SHA-256 60e76551c000ffe8…

MALICIOUS

PDF

57.3 KB Created: 2020-08-26 13:18:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 184aedc1859d3cab1ae5eaa7d070a038 SHA-1: 8203f473deb0e85d562e02ac4923fb0470925cea SHA-256: 60e76551c000ffe8a110c5caee6b787b06709bd972da878c2ffc595299ccb655
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a redirector link, indicating an attempt to drive traffic to malicious or potentially malicious sites. The embedded content, though obfuscated, includes URLs that are part of this link farm, suggesting a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector and link farm.

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/pify?keyword=vray+material+library+for+3ds+max+20
    • http://files.greyhounds4me.com/uploads/1/3/1/4/131411539/xajuxiral.pdf
    • http://files.carlowchoralsociety.net/uploads/1/3/1/3/131398498/8938400.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0440/7332/0600/files/robuwarobavupikarupoxufu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6784/2459/files/46198146380.pdf
    • https://cdn.shopify.com/s/files/1/0433/6284/4837/files/engulf_noun_form.pdf
    • https://cdn.shopify.com/s/files/1/0454/6284/7640/files/how_to_build_a_car_adrian_newey_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/8181/0599/files/favabenigixawapuwebejelar.pdf
    • https://cdn.shopify.com/s/files/1/0432/8567/6188/files/vapuvuledamebikovajabazu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6250/files/list_of_occupational_diseases.pdf
    • https://cdn.shopify.com/s/files/1/0462/3109/3397/files/fulodotaseziwigi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63529720688.pdf
    • https://cdn.shopify.com/s/files/1/0430/4168/5665/files/rekogebemuronafejeluso.pdf
    • https://cdn.shopify.com/s/files/1/0454/0645/3928/files/easter_alleluia.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009293.bin
2bf4c427a441e53e41bab0f8aa0af5071814f52de3b340ac42e8a55e6bfa3722		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9293 5448 bytes
font_01_sfnt_off0000a521.bin
0fbc1a580d99d0d3e23afdd732772cb9b4a85d4545b3996397938f57f6796e0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA521 10864 bytes
font_02_sfnt_off0000ca4e.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA4E 4324 bytes

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