Malicious PDF — malware analysis report

Static analysis result for SHA-256 58adf2bd9a48c216…

MALICIOUS

PDF

41.9 KB Created: 2020-08-11 05:17:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4d43ae2c5ee0ff4d27a445fa2e21ce3 SHA-1: a0baf4ca9c8c5de6a8d9413b6906757625fa61d2 SHA-256: 58adf2bd9a48c216e196bb70b7271ec8f2f585846515e24bb06c745c241b2395
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to Shopify domains, forming a link farm. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which likely serves as the initial stage for delivering a payload. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=ataxia+cerebelosa+pdf
    • http://files.expertcharlottelocksmith.com/uploads/1/3/0/7/130738548/eb75a35e8b44.pdf
    • http://likizolup.bertabooks.com/uploads/1/3/1/6/131606407/wujunafuguwite_fipitonutexodab.pdf
    • http://files.northwestscales.com/uploads/1/3/1/4/131453146/6478159.pdf
    • http://files.travelfarther.com/uploads/1/3/2/3/132302924/bodujakilimokudumu.pdf
    • http://files.ptccommunitygardens.org/uploads/1/3/1/6/131607232/jinokolu_penofaxadutub_bojow.pdf
    • https://cdn.shopify.com/s/files/1/0433/7664/0156/files/stand_by_me_prince_royce.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/artifacts_in_histopathology.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/32863168057.pdf
    • https://cdn.shopify.com/s/files/1/0428/5523/5740/files/vegafejeledogan.pdf
    • https://cdn.shopify.com/s/files/1/0428/9134/6079/files/nucleophilic_acyl_substitution_reaction.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xodujanizovu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/9687708992.pdf
    • https://cdn.shopify.com/s/files/1/0440/3144/3094/files/70866767654.pdf
    • https://cdn.shopify.com/s/files/1/0430/9165/6855/files/warhammer_shadow_of_the_horned_rat.pdf
    • https://cdn.shopify.com/s/files/1/0428/2938/1791/files/conformado_de_plasticos.pdf
    • https://cdn.shopify.com/s/files/1/0431/8871/5682/files/34362730376.pdf
    • https://cdn.shopify.com/s/files/1/0436/3576/9497/files/resuzamam.pdf
    • https://cdn.shopify.com/s/files/1/0431/9258/2293/files/guitar_learning_book_free.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_off0000657f.bin
d6af0ccc41bc9f8d3e88ad4de8f55a5d72e2e63d85694ee9b5f1e347812e25a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x657F 5348 bytes
font_01_sfnt_off000077af.bin
b723f22f5d57965d917a8a3cc5544f4e83227087d49d466945bc2991adb9ff85
pdf-font-stream PDF embedded font (sfnt) at offset 0x77AF 10320 bytes