Malicious PDF — malware analysis report

Static analysis result for SHA-256 c186acd986197458…

MALICIOUS

PDF

44.7 KB Created: 2020-08-21 22:20:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6cfea935fe0643da527dd8bb80213fae SHA-1: a2406a548f4f0f07a0901ac013a1135d9fc8e40c SHA-256: c186acd98619745820cc6cdd3428f977a26ce7da30e1257109ff2a639c3885c8
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious infrastructure. The document body, though heavily obfuscated, contains text related to 'Cambridge book' and 'listening answers', suggesting a lure to disguise the malicious intent. The primary malicious URL identified is https://ttraff.cc/pify?keyword=cambridge+book+1+test+3+listening+answers, which is flagged as a malicious redirector.

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=cambridge+book+1+test+3+listening+answers
    • http://likoje.itmonline-updates.org/uploads/1/3/2/6/132681352/d8fa898f.pdf
    • http://mamezafi.tristatebiomedical.com/uploads/1/3/1/6/131637016/7ec71f52113ec.pdf
    • http://bidifokaz.realviewsupplies.com/uploads/1/3/1/6/131607600/1302353.pdf
    • http://files.harkwell-labels.co.uk/uploads/1/3/1/4/131453674/971fc0c.pdf
    • http://files.mackenzieosborne.com/uploads/1/3/0/8/130814397/480c0.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/identify_parts_of_speech_worksheet_doc.pdf
    • https://cdn.shopify.com/s/files/1/0429/3863/0300/files/ligupibepesipumog.pdf
    • https://cdn.shopify.com/s/files/1/0438/1681/2706/files/prot_pally_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/5689/0013/files/vobuzanidokomikas.pdf
    • https://cdn.shopify.com/s/files/1/0429/0389/6230/files/jenowadexusivuv.pdf
    • https://cdn.shopify.com/s/files/1/0437/3463/0549/files/gixuvukibizogir.pdf
    • https://cdn.shopify.com/s/files/1/0440/4966/2117/files/55149049808.pdf
    • https://cdn.shopify.com/s/files/1/0432/8531/5739/files/biology_dictionary_english_to_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0435/6974/1983/files/wasekoselonebudo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8913/files/resumo_capites_da_areia.pdf
    • https://cdn.shopify.com/s/files/1/0430/5515/3303/files/41594782601.pdf
    • https://cdn.shopify.com/s/files/1/0431/4418/3970/files/52656262314.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_off000066cb.bin
2eb41aa48b1033be934b45619047dbf57a1e36b502177dec8663c39f4fa47c80
pdf-font-stream PDF embedded font (sfnt) at offset 0x66CB 5560 bytes
font_01_sfnt_off000079ba.bin
e7961c7e17a5c6c2bddbc884de2d1f70273cc6e82c8e66f329963c8dce8b95e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x79BA 15524 bytes