Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5921a2b9c41a705…

MALICIOUS

PDF

40.7 KB Created: 2020-08-10 06:38:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 814eb761962032cd24eb6a2ae565fe41 SHA-1: 19568e2b65d44c00cc59b9d4a556a0ef0d176ecf SHA-256: b5921a2b9c41a70566579ebee2f002a37e91603eb541c6e4714ac46c30744281
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic firing indicates a link to known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily corrupted, contains text related to 'Englisch Übungen' and 'arbeitsblätter pdf', suggesting a lure to disguise malicious links as educational material. No scripts were extracted from this sample.

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.com/pify?keyword=englisch+%25C3%25BCbungen+uhrzeiten+klasse+5+arbeitsbl%25C3%25A4tter+pdf
    • http://mejotede.nationalriskmanagementgroup.com/uploads/1/3/2/7/132740930/mokijim.pdf
    • http://konedek.impact-gymnastics.com/uploads/1/3/1/4/131408100/juxabiv.pdf
    • http://belofaxog.westervilletherapy.com/uploads/1/3/1/4/131482975/4729119.pdf
    • http://files.whitemetalres.com/uploads/1/3/0/7/130740191/rezisorofakiku_wijusi_pegigonij_jobamodavufon.pdf
    • http://misukew.seasidedecorativepainters.com/uploads/1/3/2/3/132303382/fojolewikeb.pdf
    • https://cdn.shopify.com/s/files/1/0431/9258/2293/files/31912764167.pdf
    • https://cdn.shopify.com/s/files/1/0434/4853/3142/files/xabezovufupajutef.pdf
    • https://cdn.shopify.com/s/files/1/0433/0346/9221/files/7379718990.pdf
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/ruwazowibivema.pdf
    • https://cdn.shopify.com/s/files/1/0434/2644/7525/files/second_law_of_thermodynamics_equation.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/federal_water_pollution_control_act.pdf
    • https://cdn.shopify.com/s/files/1/0437/0864/5541/files/xekamokaxupak.pdf
    • https://cdn.shopify.com/s/files/1/0434/0118/3384/files/34293925317.pdf
    • https://cdn.shopify.com/s/files/1/0431/6515/5487/files/meningoencephalitis_review.pdf
    • https://cdn.shopify.com/s/files/1/0434/1848/4885/files/rimixepodidimovawojuke.pdf
    • https://cdn.shopify.com/s/files/1/0433/4993/4229/files/gikexabaruzagokaxibokada.pdf
    • https://cdn.shopify.com/s/files/1/0430/7854/9665/files/68485522432.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a0f.bin
30ee1d923ff9f96bb463e15cbf203ee16100163c603682526fbc1624538e73ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A0F 6108 bytes
font_01_sfnt_off00006e19.bin
65f3cacee482763ea725495b5dd807015c0d9e26390298d20c59b38ba7d078c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E19 11316 bytes