Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4858edf12ffdf4b…

MALICIOUS

PDF

43.6 KB Created: 2020-08-08 19:48:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fed876a572da865060828f80bca160e6 SHA-1: c5a34d5fbfe61af714cb16ec170d944ade063e9b SHA-256: f4858edf12ffdf4bc133212ab32a47512f8905672b7c9bf741c2dca265de4c38
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including a significant number on cdn.shopify.com. One of the primary links, presented in the document body, redirects to a malicious URL (https://ttraff.cc/pify?keyword=admin+assistant+cover+letter+pdf), suggesting a phishing or redirection attempt. The document's content and structure indicate a lure to trick users into clicking the malicious link, likely leading to further compromise.

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=admin+assistant+cover+letter+pdf
    • http://files.lifetimeepoxyfloors.com/uploads/1/3/2/6/132695257/pewojivu.pdf
    • http://files.clockworkpositive.com/uploads/1/3/2/6/132683080/76fe7.pdf
    • http://files.ruirosalab.com/uploads/1/3/2/7/132740814/6982546.pdf
    • http://files.synergy-electrical.com/uploads/1/3/1/3/131382092/1191589.pdf
    • http://files.thedottedpig.com/uploads/1/3/2/7/132712251/f5a73.pdf
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/gasewem.pdf
    • https://cdn.shopify.com/s/files/1/0428/4229/2390/files/wozumazejirisibilaxunij.pdf
    • https://cdn.shopify.com/s/files/1/0428/5274/5375/files/29472834771.pdf
    • https://cdn.shopify.com/s/files/1/0436/0785/1171/files/40295185596.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8577/files/20485327301.pdf
    • https://cdn.shopify.com/s/files/1/0431/5630/8123/files/tinkers_material_traits.pdf
    • https://cdn.shopify.com/s/files/1/0433/4603/4846/files/texas_direct_auto_reviews.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/646255477.pdf
    • https://cdn.shopify.com/s/files/1/0439/2920/6952/files/pexeguzesukanezobe.pdf
    • https://cdn.shopify.com/s/files/1/0437/6294/2106/files/83483678125.pdf
    • https://cdn.shopify.com/s/files/1/0428/8266/2553/files/science_reading_comprehension_passages_middle_school.pdf
    • https://cdn.shopify.com/s/files/1/0430/4669/9165/files/ukulele_chord_chart.pdf
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/siduxefevij.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_off00006ade.bin
501d2a4e252ff42e23b182bfafa289fc5dfdba0217cc12791fbf9c667e92c4df
pdf-font-stream PDF embedded font (sfnt) at offset 0x6ADE 5352 bytes
font_01_sfnt_off00007cff.bin
900b075292970ec36856c7f9cc3b4ddec0847b460af3fc05b9d4146e792295db
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CFF 10688 bytes