Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f861325caac507b…

MALICIOUS

PDF

41.6 KB Created: 2020-10-31 19:35:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a903c54c30a54b7c7725401cd4998d7b SHA-1: b3d2ebf91c33c629a2a949c3dc790305e7136220 SHA-256: 7f861325caac507b04f1043ba079e23a5bfeb547f22f3f7649d655bf1d9f6d1b
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. The document body, though heavily obfuscated, contains this URL, suggesting an attempt to redirect the user to a malicious site. The presence of numerous embedded links, many pointing to S3 buckets, indicates a link farm or SEO poisoning attempt to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://ggtraff.ru/aws?keyword=wedding+hairstyles+for+thin+hair+with+veil
    • https://cdn-cms.f-static.net/uploads/4393893/normal_5f9294944c40b.pdf
    • https://tibiwurab.weebly.com/uploads/1/3/2/6/132695994/xozewamar.pdf
    • https://cdn-cms.f-static.net/uploads/4416131/normal_5f9a74277511f.pdf
    • https://zalopajozi.weebly.com/uploads/1/3/1/4/131453352/6927457.pdf
    • https://cdn-cms.f-static.net/uploads/4374022/normal_5f89b3b8af399.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vatosolikijike/lamogikevudabosowukojo.pdf
    • https://s3.amazonaws.com/luramamelolem/zikomu.pdf
    • https://s3.amazonaws.com/wonoti/best_psychology_books_in_malayalam.pdf
    • https://s3.amazonaws.com/debamijizozexo/wubiluv.pdf
    • https://s3.amazonaws.com/jukezeluf/java_8_lambdas_free_download.pdf
    • https://s3.amazonaws.com/jimugivos/75816602466.pdf
    • https://s3.amazonaws.com/banula/burger_bistro_hazelwood_menu.pdf
    • https://uploads.strikinglycdn.com/files/19416a91-365c-4e19-bb97-d3194a04572f/xifubusefagatuxujig.pdf
    • https://uploads.strikinglycdn.com/files/5ade1da8-add9-4e63-ac50-26d5dc961a98/no_long_talking_drake.pdf
    • https://s3.amazonaws.com/libosokune/mukukariwomuxebegewixab.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000942e.bin
69c83c8c112c80875b4a419a7ac42a9a2e067270db7becdc62950d5fe4ede9b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x942E 5436 bytes

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