Malicious PDF — malware analysis report

Static analysis result for SHA-256 31e5db89942cb4d3…

MALICIOUS

PDF

43.1 KB Created: 2020-08-08 12:23:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79809cd01df650d3ab630a39a77798ed SHA-1: f9af5757d844a2edbf7eac033bcfd6dc7bc8dc50 SHA-256: 31e5db89942cb4d32a1077b0596dbe3665839ac2d7dc9d98f01fca803d054dec
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to known malicious infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a mass of external PDF links, with the primary redirector URL being https://ttraff.com/pify?keyword=ultralight+backpacking+tips+mike+clelland+pdf. This suggests the document's primary purpose is to lure users into clicking these links, likely leading to phishing or malware downloads.

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=ultralight+backpacking+tips+mike+clelland+pdf
    • http://mekozoj.revjennifergray.com/uploads/1/3/2/6/132682076/rezafolifotab.pdf
    • http://files.keryx.org/uploads/1/3/0/9/130969831/burulopat.pdf
    • http://files.semo-cbd.com/uploads/1/3/2/7/132740951/zalomabexifasuk_vesezexaduka_ruvelopobap.pdf
    • https://cdn.shopify.com/s/files/1/0433/6871/0309/files/xuwipi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0610/7552/files/tepigipulikagatom.pdf
    • https://cdn.shopify.com/s/files/1/0433/1651/0873/files/latin_bass_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/2376/1571/files/25182107747.pdf
    • https://cdn.shopify.com/s/files/1/0437/7473/8593/files/chocobo_racing_guide_ffxiv.pdf
    • https://cdn.shopify.com/s/files/1/0437/7355/8935/files/biological_control_of_insect_pests_and_weeds.pdf
    • https://cdn.shopify.com/s/files/1/0432/0568/9499/files/gejulikojiwugekiputafi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/rulori.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/givufixizosu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0316/6372/files/86890319944.pdf
    • https://cdn.shopify.com/s/files/1/0432/8030/2240/files/91062204112.pdf
    • https://cdn.shopify.com/s/files/1/0431/6472/9512/files/classic_wow_alliance_leveling_guide.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_off000068b2.bin
dffbd5e95b7c02031f4f3295f9ac435a3310d1f4b631a1e958b21473c9832585		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68B2 5764 bytes
font_01_sfnt_off00007c22.bin
3a86581db11500d41a54d17ddd6d5158d5414e03cb9bf40462cea8d91b78075b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C22 10300 bytes

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