Malicious PDF — malware analysis report

Static analysis result for SHA-256 abbaed2e7a8b9a6a…

MALICIOUS

PDF

57.2 KB Created: 2020-08-19 10:25:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c10eab9e07e6508bbe903aa6db052bdd SHA-1: bb2ba2ad51df7b0a250559a75a8dcdf8d499db1f SHA-256: abbaed2e7a8b9a6acbbb3ca91da36994e530ad33580f37f2f1efad989204f9ee
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass external PDF link farm, suggesting a tactic to manipulate search engine results or distribute malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=bertelli+1947+sheets+review
    • http://files.bethanylutheranrlf.com/uploads/1/3/1/3/131381819/sizumomonogup.pdf
    • http://files.lianginsects.com/uploads/1/3/1/4/131453784/6784726.pdf
    • http://files.passport2pain.com/uploads/1/3/0/7/130738701/kerigidixobu-tokumurupoj-jofamabum.pdf
    • http://files.sativasoapshoppe.com/uploads/1/3/0/8/130814118/sexamafudixod.pdf
    • http://files.fillogreekbakeshop.com/uploads/1/3/2/3/132303410/169757a0198e.pdf
    • https://cdn.shopify.com/s/files/1/0431/2861/9168/files/88445340986.pdf
    • https://cdn.shopify.com/s/files/1/0428/8462/8633/files/vafuwamexiwufefidubo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7670/4664/files/bing_search_engine_mac.pdf
    • https://cdn.shopify.com/s/files/1/0437/7319/8487/files/boss_baby_coloring_pages.pdf
    • https://cdn.shopify.com/s/files/1/0434/4047/2229/files/53933361307.pdf
    • https://cdn.shopify.com/s/files/1/0440/3593/2310/files/razas_de_camelidos_sudamericanos.pdf
    • https://cdn.shopify.com/s/files/1/0430/6426/2818/files/rexuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/4288/2215/files/huggies_wipes_with_glass.pdf
    • https://cdn.shopify.com/s/files/1/0436/0955/5107/files/fukizeguniku.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_off0000a171.bin
9b154dbe80bb1e4064bda67cd64f7d7cd435be97600e8dcd0f5d0896a749d898		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA171 5140 bytes
font_01_sfnt_off0000b313.bin
0395d52a564a793c4d0b392888a44881684b09f02f3aadb2b8be5aba18a3ac4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB313 10916 bytes

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