Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a5457ecc3287c04…

MALICIOUS

PDF

40.0 KB Created: 2020-08-12 15:37:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 816c100615d3f4ccd7a5f16a1b9f62b9 SHA-1: cabf0ecb397cc99db28dce127aa45023912f596f SHA-256: 8a5457ecc3287c042c5a96d40a263f3cc005fed85bc9e6c02d44542446fedb28
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 pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.com'. This suggests a tactic to distribute malicious content or phishing pages under the guise of academic or informational documents. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=bsc+computer+science+subjects+pdf', reinforcing the malicious redirector intent.

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=bsc+computer+science+subjects+pdf
    • http://biforuga.jillkellerpeters.com/uploads/1/3/1/8/131871390/gufanomi.pdf
    • http://files.oceanafamilyliteracy.org/uploads/1/3/1/1/131163898/xutarujosapi.pdf
    • http://files.marzipan-media.com/uploads/1/3/1/8/131856184/7584706.pdf
    • http://files.mskenna.com/uploads/1/3/2/7/132740296/barizexeg.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5676577217.pdf
    • https://cdn.shopify.com/s/files/1/0428/5313/8588/files/arctic_cat_atv_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/vixizipola.pdf
    • https://cdn.shopify.com/s/files/1/0433/9751/3381/files/35968217255.pdf
    • https://cdn.shopify.com/s/files/1/0449/8112/5278/files/fight_your_ticket_win_in_california.pdf
    • https://cdn.shopify.com/s/files/1/0427/7298/8071/files/zumogejatowezomeguvul.pdf
    • https://cdn.shopify.com/s/files/1/0435/7606/6211/files/office_2007_configures_every_time.pdf
    • https://cdn.shopify.com/s/files/1/0437/0087/9510/files/pijigireforifokanan.pdf
    • https://cdn.shopify.com/s/files/1/0435/4686/9911/files/30578213360.pdf
    • https://cdn.shopify.com/s/files/1/0431/1410/2951/files/can_t_stop_bass_tab.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_off00005eef.bin
24eb3c8b6971f352050e8cf35adaaf1c316bf294e7a4f319802a91499c92453e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EEF 5324 bytes
font_01_sfnt_off000070ee.bin
ca31a61da286e698b5cdc8cc8cff9538dc537eba33c48b069d5594341f1023ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70EE 10120 bytes

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