Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5cc90de944cb2c5…

MALICIOUS

PDF

56.0 KB Created: 2020-08-04 19:33:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 988434e1833b462cb52a41baeaf1dd78 SHA-1: 5617e5774f0baae8e641c4e5997cc23ddcb07007 SHA-256: f5cc90de944cb2c5a377af575d3750cb052adebb48c8bb2030b39048e1a7480c
150 Risk Score

Malware Insights

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

The PDF contains numerous links, with one pointing to a known malicious redirector at 'https://ttraff.ru/pify?keyword=vba+excel+2020+for+dummies+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect users to malicious content. The presence of a large number of external PDF links further supports a link-farming or redirection-based attack pattern.

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=vba+excel+2020+for+dummies+pdf
    • http://files.handyplan.net/uploads/1/3/2/6/132695732/xebefiwaguti_gusadapeja_jatobozilezu_babofefodudov.pdf
    • http://files.joelouismusic.com/uploads/1/3/1/3/131383943/de22852315f2268.pdf
    • http://files.isbhu.com/uploads/1/3/2/6/132681891/siduwekemudonijokuvu.pdf
    • https://cdn.shopify.com/s/files/1/0436/4071/7472/files/17169209683.pdf
    • https://cdn.shopify.com/s/files/1/0434/6652/2790/files/fallout_4_ballistic_weave_mod.pdf
    • https://cdn.shopify.com/s/files/1/0436/7689/3334/files/47049276516.pdf
    • https://cdn.shopify.com/s/files/1/0435/8209/5517/files/fisher_yates_shuffle_java.pdf
    • https://cdn.shopify.com/s/files/1/0433/7316/6757/files/kirevezogifetikuxepijire.pdf
    • https://cdn.shopify.com/s/files/1/0431/8517/6736/files/7717840599.pdf
    • https://cdn.shopify.com/s/files/1/0432/3645/8654/files/guludelozoxepenovezur.pdf
    • https://cdn.shopify.com/s/files/1/0433/9875/8567/files/97673957129.pdf
    • https://cdn.shopify.com/s/files/1/0430/8808/5145/files/bowiripuwurava.pdf
    • https://cdn.shopify.com/s/files/1/0435/8668/3037/files/zelasukimoxalafudajo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5742/2229/files/setivenegi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000900a.bin
1ad060e9032bcc051812ffd66dac1a56c142ef33859455230ef9e87eb9ab3955		 pdf-font-stream PDF embedded font (sfnt) at offset 0x900A 5444 bytes
font_01_sfnt_off0000a285.bin
d533874fc435444b9ab4840c078e03efca83ea2d05570579eec3bf6283dfd26d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA285 10128 bytes
font_02_sfnt_off0000c52e.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC52E 4324 bytes

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