Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3c1188e813c22d8…

MALICIOUS

PDF

40.2 KB Created: 2020-08-10 13:02:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c6fc88f975958b5d8690a5a4b8a8c10 SHA-1: 4e9b3e279762a92b9b547686e61534e2d72f71ca SHA-256: d3c1188e813c22d871f4f02c99afb61ed7f6fd3cfed53bdadb2a29aa0ed626ef
120 Risk Score

Malware Insights

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

The PDF contains a deceptive document body and embeds a large number of external links, many of which point to PDFs hosted on Shopify. One critical heuristic firing indicates that a link within the PDF redirects to known malicious infrastructure. The primary malicious URL is https://ttraff.cc/pify?keyword=calculating+area+of+irregular+shapes+pdf, which likely serves as a redirector to a further malicious payload.

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.cc/pify?keyword=calculating+area+of+irregular+shapes+pdf
    • http://files.kevmol.com/uploads/1/3/0/7/130775607/8447805.pdf
    • http://files.newenglandgoodlife.net/uploads/1/3/1/6/131637300/buworovu-zalufowuperi-zuwopifabemifaz-wokisadifakixod.pdf
    • http://files.j-west.net/uploads/1/3/0/7/130775286/redinizubotorenene.pdf
    • https://cdn.shopify.com/s/files/1/0432/5516/9186/files/86947244349.pdf
    • https://cdn.shopify.com/s/files/1/0435/6653/0728/files/70437795874.pdf
    • https://cdn.shopify.com/s/files/1/0435/2199/9008/files/tipe_isoterm_adsorpsi.pdf
    • https://cdn.shopify.com/s/files/1/0435/5021/2264/files/sustainable_building_design_manual_teri.pdf
    • https://cdn.shopify.com/s/files/1/0434/0105/2312/files/gomawizozarez.pdf
    • https://cdn.shopify.com/s/files/1/0430/7150/4537/files/dexizugigazuvaxifi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8099/0366/files/48426361007.pdf
    • https://cdn.shopify.com/s/files/1/0427/6820/3942/files/31285931006.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/3265326212.pdf
    • https://cdn.shopify.com/s/files/1/0433/3781/0075/files/wusojonowojawafe.pdf
    • https://cdn.shopify.com/s/files/1/0435/6915/2159/files/37971288584.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_off00005f78.bin
89f8787987beae2df6711b13ccf89337aa78813b4e9ebb671309e1772df6decb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F78 5320 bytes
font_01_sfnt_off00007187.bin
936baedd56560183e460459554ce74a5feb6a3b3448047223c82307e42a88825		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7187 10128 bytes

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