Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d785a62057497c7…

MALICIOUS

PDF

40.4 KB Created: 2020-08-04 01:32:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89356b1ca3f85a8d74123eb712f1bc4d SHA-1: bc87f6ad57a15ab4bfa7eeaa1d38eaa98f50c6ea SHA-256: 7d785a62057497c758ee526e04dba8c0ef1c31d64e2adad540b7bbfc97cd4efa
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it links to known malicious redirector infrastructure. The document body and embedded links suggest a lure to convert files, directing users to the malicious URL. The primary IOC is the redirector URL, which is likely used to host further malicious content or phishing pages.

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=small+convert+pdf+to+excel
    • http://files.staceyweckstein.biz/uploads/1/3/1/8/131856331/5017480.pdf
    • http://files.aramgershuni.com/uploads/1/3/1/8/131856358/2863269.pdf
    • http://files.ngatipaoaiwi.co.nz/uploads/1/3/1/3/131380467/tedolajonur.pdf
    • http://files.bascombjames.com/uploads/1/3/2/8/132816066/xagewowameju.pdf
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/xazuw.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8032/files/48387130158.pdf
    • https://cdn.shopify.com/s/files/1/0437/0874/3834/files/tigovumawoxaza.pdf
    • https://cdn.shopify.com/s/files/1/0434/6868/5464/files/kidilamudalaxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/9436/7649/files/fadotumedune.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/82370673146.pdf
    • https://cdn.shopify.com/s/files/1/0428/6935/8758/files/zamudebidoxu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jewaxepolirabosumasedud.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8056/files/44846636949.pdf
    • https://cdn.shopify.com/s/files/1/0431/0132/3420/files/4973531925.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/bibliophile_an_illustrated_miscellany.pdf
    • https://cdn.shopify.com/s/files/1/0437/3748/1365/files/nukatonitoxerokedixadi.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_off00006141.bin
ca64496fc2a93ef2304844ffdd4e2d71192eb5f1dce5ec6b27de5549ac52ba04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6141 5356 bytes
font_01_sfnt_off00007369.bin
31e04234e58aa78daaf7e4836b468c78f6fc71b58c7f1e12740952d26f00beb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7369 9856 bytes

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