Malicious PDF — malware analysis report

Static analysis result for SHA-256 448a6e1d65d040a3…

MALICIOUS

PDF

38.6 KB Created: 2020-08-10 21:38:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f976695af6e22c4e41a13f05bfd880b SHA-1: 26bf851389c394b82a3675dc6a0d268526a758a5 SHA-256: 448a6e1d65d040a3bb238b50eafddb5c651e801082370e17493730eea62833eb
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to Shopify domains hosting other PDFs, but one critical link directs to a known malicious redirector at 'ttraff.com'. This suggests a link farm or redirection tactic to obscure the final malicious destination. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=knee+pain+exercises+arc+pdf', indicating the primary lure is related to knee pain exercises.

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=knee+pain+exercises+arc+pdf
    • http://files.helenjonesart.com/uploads/1/3/1/3/131380953/0222c41b1571c.pdf
    • http://files.eloisekerr.co.uk/uploads/1/3/1/1/131164402/dumefawavevu.pdf
    • http://xuripawo.triplerranch.net/uploads/1/3/2/6/132681352/5266793.pdf
    • http://files.counterpunchparkinsons.com/uploads/1/3/0/8/130874317/7f13aefe3.pdf
    • https://cdn.shopify.com/s/files/1/0433/4478/9669/files/64836524310.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3100392900.pdf
    • https://cdn.shopify.com/s/files/1/0431/7102/0960/files/fasukukilumejagarumidenex.pdf
    • https://cdn.shopify.com/s/files/1/0427/8992/9116/files/toronukafewinaneli.pdf
    • https://cdn.shopify.com/s/files/1/0430/0662/3903/files/doxanel.pdf
    • https://cdn.shopify.com/s/files/1/0434/4152/0790/files/garemolo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/mapa_turistico_aveiro.pdf
    • https://cdn.shopify.com/s/files/1/0433/9371/2286/files/pisuduro.pdf
    • https://cdn.shopify.com/s/files/1/0429/3689/3599/files/7077146966.pdf
    • https://cdn.shopify.com/s/files/1/0431/5034/4352/files/l_agenda_2020_de_l_union_africaine.pdf
    • https://cdn.shopify.com/s/files/1/0427/4749/4567/files/xumaxowabopofomanodozo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6409/8970/files/independence_day_anchoring_script_in_english_for_school.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_off00005beb.bin
171ef04e093a18b414487aad0941e968c44766d0bfa2261a6ec98940361ebdda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BEB 5156 bytes
font_01_sfnt_off00006d78.bin
d8ec094874dbd567f32f795f22f7e61f0f8cf2ce66a98c01008b57448418036e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D78 9440 bytes

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