Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e524b52c30f86d4…

MALICIOUS

PDF

41.8 KB Created: 2020-08-06 13:16:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b4a71408dafabdf711709939ecc3a63 SHA-1: 48c27b54387d1dcfba92ba47df0b2399c8ddbc28 SHA-256: 5e524b52c30f86d484c001b55ecd923cf14e0e8aecba1f81c13da4597cdc569e
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=beekeeping+manual+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to beekeeping and URLs, suggesting a lure to a malicious site. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=beekeeping+manual+pdf
    • http://files.philsdrivingschoolgb.com/uploads/1/3/0/9/130968994/1605550.pdf
    • http://files.mcyouthfootball.com/uploads/1/3/1/4/131482946/bikajemawakeku.pdf
    • http://files.jumpinrealestate.com/uploads/1/3/2/6/132681351/rabubutumazedun-selaxovuvivaxum-xatofega.pdf
    • http://files.mindfulmoto.us/uploads/1/3/0/7/130739387/5964010.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/9254/8511/files/8477060708.pdf
    • https://cdn.shopify.com/s/files/1/0435/7799/9519/files/14441272756.pdf
    • https://cdn.shopify.com/s/files/1/0437/6153/3089/files/nudagedurelif.pdf
    • https://cdn.shopify.com/s/files/1/0432/7299/4979/files/mutikegezodaxepixor.pdf
    • https://cdn.shopify.com/s/files/1/0430/7193/0529/files/july_2020_calendar_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/8692/1374/files/wodosepijogatupa.pdf
    • https://cdn.shopify.com/s/files/1/0431/5473/5264/files/leadership_styles_and_their_advantages_and_disadvantages.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mupesoxozuwimufuvijolus.pdf
    • https://cdn.shopify.com/s/files/1/0433/0166/6969/files/44493068033.pdf
    • https://cdn.shopify.com/s/files/1/0429/8558/6849/files/navukoputofabexap.pdf
    • https://cdn.shopify.com/s/files/1/0433/8103/1064/files/88697757949.pdf
    • https://cdn.shopify.com/s/files/1/0435/4162/7029/files/xapolatix.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_off00006743.bin
c7c61f11d4d09a611f11dc09272dad6216514901d2ddf3ee6fb32b92ec2e24b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6743 5200 bytes
font_01_sfnt_off000078ec.bin
3fd8020b4b968e2ef83e8759fc55c9708683519ef9b15d9197d1207552bff905
pdf-font-stream PDF embedded font (sfnt) at offset 0x78EC 9812 bytes