Malicious PDF — malware analysis report

Static analysis result for SHA-256 00b46ad1b466986e…

MALICIOUS

PDF

32.7 KB Created: 2020-08-22 06:57:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9dfdd4d79dffaa807ed29e882a80b4e SHA-1: 042f27a7c40b7bce2d135f24fb166c7bdb379245 SHA-256: 00b46ad1b466986e92a39df6236d48991bcdce0bc93727cb5e6d05a508ada932
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains references to the malicious URL and other PDF files, suggesting a link farm or redirection scheme designed to lure users to malicious content.

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=asante+baba+remix+mp4
    • http://sazedozo.thetaitungteacher.com/uploads/1/3/1/3/131382243/ripemefoxis.pdf
    • http://files.upstateyorkiesandmorkies.com/uploads/1/3/0/7/130776205/483493.pdf
    • http://files.rosminicentrewisbech.org/uploads/1/3/0/9/130969728/vekogud-tositujane-pafinadox.pdf
    • http://files.oclegalnews.com/uploads/1/3/1/4/131406036/mopaxanevaruna.pdf
    • http://files.microskytech.com/uploads/1/3/1/4/131437254/ramifova_rowabupekisano_tadiza_zuxopirasenegaz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0459/6953/9232/files/chemical_analysis_of_water_report.pdf
    • https://cdn.shopify.com/s/files/1/0428/2282/8198/files/international_advertising_strategy.pdf
    • https://cdn.shopify.com/s/files/1/0428/9419/6902/files/29326573613.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5211/files/40669862278.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bodadajigewodozisidezufe.pdf
    • https://cdn.shopify.com/s/files/1/0437/6428/5592/files/41540644918.pdf
    • https://cdn.shopify.com/s/files/1/0430/0200/3615/files/python_dictionary_to_json.pdf
    • https://cdn.shopify.com/s/files/1/0463/8585/6667/files/vamuxe.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000041c3.bin
d6b11f232f0220bd4fc5d166b68b9286a419e61060d88afd0677334664c0f08e
pdf-font-stream PDF embedded font (sfnt) at offset 0x41C3 5220 bytes
font_01_sfnt_off00005368.bin
aef0834093d654c50c6f4ebb75455d859fb3030a2206932864f2f6b9ff22a1e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x5368 10192 bytes