Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd6adadbf02044ed…

MALICIOUS

PDF

45.1 KB Created: 2020-08-14 09:48:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5d97591f6633292077d8936401f3279 SHA-1: 2b93fd96eef69c280dedc9bec9c551b7fd184476 SHA-256: dd6adadbf02044ed4874cd9b4a7805394fa851c910689dcab562f5f193ab13b1
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, many pointing to Shopify domains hosting other PDFs, and one critical link to a known malicious redirector at 'ttraff.cc'. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be social engineering via a link that leads to further malicious content or phishing pages.

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=apa+annotated+bibliography+word+template
    • http://files.haywardfitnessfanatics.com/uploads/1/3/0/8/130874413/dugen.pdf
    • http://files.robeltemesgen.com/uploads/1/3/2/8/132816091/777f9c4684b2.pdf
    • http://feputatul.autochthonamericanpeoplenation.com/uploads/1/3/1/6/131606746/bc3da01434.pdf
    • http://files.bluetonemusicusa.com/uploads/1/3/1/6/131606861/c43f9a7b1c4e8.pdf
    • https://cdn.shopify.com/s/files/1/0434/5249/8070/files/fabujotolovugebekoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4653/files/kezotesiteribinizexewo.pdf
    • https://cdn.shopify.com/s/files/1/0446/7310/6083/files/mathematics_textbook_grade_7.pdf
    • https://cdn.shopify.com/s/files/1/0429/8165/4687/files/bugokidujup.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9464/files/xesisoxaxivurarozasutogu.pdf
    • https://cdn.shopify.com/s/files/1/0435/1872/2207/files/pivupaxegigerokal.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/3013/files/bulking_up_diet_plan.pdf
    • https://cdn.shopify.com/s/files/1/0435/9703/7730/files/56869683769.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8853/files/series_63_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/mageson.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pizegavegip.pdf
    • https://cdn.shopify.com/s/files/1/0435/9602/1919/files/makojitojatopiw.pdf
    • https://cdn.shopify.com/s/files/1/0427/7898/4614/files/89766314261.pdf
    • https://cdn.shopify.com/s/files/1/0431/2950/3901/files/makalah_aspek_keperilakuan_pada_etika_akuntan.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_off0000647d.bin
f6ebf9c54db33b1acb9088465098cef725846486a3e2b1ca330b901ccf2c0294		 pdf-font-stream PDF embedded font (sfnt) at offset 0x647D 5304 bytes
font_01_sfnt_off00007664.bin
040eb0a60b48d8f04b2b2016a939fc0ee9f928bf7b3522bc7117f68e751b3f93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7664 10120 bytes
font_02_sfnt_off000098f7.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98F7 4324 bytes

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