Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a592bdd6dab0a00…

MALICIOUS

PDF

50.8 KB Created: 2020-07-29 23:07:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97bbe418763f1841ac03492525291dfa SHA-1: c783e20cde4165dc7c7a18e01e8bc905e49daa22 SHA-256: 7a592bdd6dab0a0047d921c14553b4b56d11a13777e7e70ebf71891b04b39e8c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The document body appears to be obfuscated or corrupted, preventing a clear understanding of its specific lure.

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=scorching+love+jonaxx+pdf
    • http://files.rochellelucey.com/uploads/1/3/1/6/131607943/vutefaletidi.pdf
    • http://files.notronmfgsales.com/uploads/1/3/0/7/130776728/xopoxef-dugivibip.pdf
    • http://files.sexysilvanaaa.co/uploads/1/3/0/8/130814714/midowawewufivaro.pdf
    • http://files.talbertsmaplefarm.com/uploads/1/3/1/3/131383842/1621410.pdf
    • http://files.lakeandhillsgardenclub.com/uploads/1/3/1/4/131406885/8048357.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/94419077604.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54101174921.pdf
    • https://cdn.shopify.com/s/files/1/0428/5969/2198/files/52542256787.pdf
    • https://cdn.shopify.com/s/files/1/0435/7016/7966/files/gisuvazuzedeko.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/56417044685.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/86700082752.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kufanagapaxo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8515/9845/files/faked.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/salabunap.pdf
    • https://cdn.shopify.com/s/files/1/0434/7330/5762/files/95003703780.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073ac.bin
901fa6a57b5138e1366ef7ad3c6eee56e2fffd9ccb68f9c760e587f8bd9675ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73AC 5252 bytes
font_01_sfnt_off00008579.bin
b3599864e241456379f5e7071e6495c0180e34f4515b97173ff621f1b8af3328		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8579 10320 bytes
font_02_sfnt_off0000a90a.bin
4b52fd5da643d9c08cc0a86f773b2f024e3274f3f861dfcac100db1ef433cf06		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA90A 16164 bytes

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