Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccd2c48eb32050ed…

MALICIOUS

PDF

52.6 KB Created: 2020-07-29 12:21:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22e59c6d3271ee58b41b8a4ec7572f0f SHA-1: d80dc00d28694c9ea200274239aa0a95c1e5095d SHA-256: ccd2c48eb32050ed5ab1b7fa93bdf199bc866afed84aad069bf8414556dfda65
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to 'high school baseball rules'. The presence of a link farm and a malicious redirector suggests an attempt to drive traffic to potentially harmful sites, likely for phishing or malware distribution.

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=high+school+baseball+rules+pdf
    • http://files.unleashyourlight.org/uploads/1/3/1/4/131406288/nagetafat-dalatisenon-teguvuvudewo-bizavumanepetu.pdf
    • http://files.planetdotjewelry.com/uploads/1/3/0/7/130739986/kisevemuzij.pdf
    • http://files.newwoodfordhs.com/uploads/1/3/2/3/132303373/1867e53512170.pdf
    • http://files.yoroadventures.com/uploads/1/3/2/7/132740338/7660921.pdf
    • http://files.thekingdomofsaguenay.com/uploads/1/3/1/8/131857758/dumorigub_kisimix_newominujoro.pdf
    • http://files.newwoodfordhs.com/uploads/1/3/2/3/132
    • https://cdn.shopify.com/s/files/1/0430/1851/8681/files/2923609675.pdf
    • https://cdn.shopify.com/s/files/1/0435/8491/3563/files/73745967796.pdf
    • https://cdn.shopify.com/s/files/1/0434/5928/1061/files/73739907031.pdf
    • https://cdn.shopify.com/s/files/1/0432/6873/5140/files/79753148256.pdf
    • https://cdn.shopify.com/s/files/1/0429/5157/3657/files/82757078233.pdf
    • https://cdn.shopify.com/s/files/1/0439/0970/9976/files/10900240341.pdf
    • https://cdn.shopify.com/s/files/1/0430/5122/1146/files/24306848795.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wuvinotagug.pdf
    • https://cdn.shopify.com/s/files/1/0437/1087/3765/files/38680497544.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8099/files/55851206743.pdf
    • https://cdn.shopify.com/s/files/1/0428/7732/1379/files/4299746866.pdf
    • https://cdn.shopify.com/s/files/1/0435/7832/7199/files/kitumededix.pdf
    • https://cdn.shopify.com/s/files/1/0431/2009/9488/files/9574583304.pdf
    • https://cdn.shopify.com/s/files/1/0435/5047/4399/files/19641713256.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_off00008fd0.bin
97d3e2bd90d4638099735b8dc9d4e22b844a528355e77b204c5fbac7040ebdb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FD0 5216 bytes
font_01_sfnt_off0000a190.bin
8944f619310f6c1e08676dcd1bc425a5c9df405edea8b2a7d7efb531cfbc1690		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA190 10392 bytes

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