Malicious PDF — malware analysis report

Static analysis result for SHA-256 e41db139ab4213ac…

MALICIOUS

PDF

41.8 KB Created: 2020-09-02 01:53:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07c31f478ff9f62c17e6bbd8d21adf2a SHA-1: 213fbfe710c84d163b69c92d8454aa3384c6e095 SHA-256: e41db139ab4213ac37f2c6e8a388c292bde57e128708a31615c3dc70039a0a1e
128 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic indicating it's a malicious redirector link, pointing to 'ttraff.club'. This URL is presented to the user as a download for 'certificate templates printable'. The file also contains a mass external PDF link farm, with many links pointing to cdn.shopify.com, though these appear benign. The presence of a visual download button lure further supports the malicious intent. No scripts were extracted, but the primary attack vector is a malicious redirector link.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.club/pify?keyword=certificate+templates+printable
    • https://cdn.shopify.com/s/files/1/0462/7493/6994/files/asn._1_viewer_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/5837/1496/files/27292951468.pdf
    • https://cdn.shopify.com/s/files/1/0434/2556/2775/files/present_value_annuity_factor_table.pdf
    • https://cdn.shopify.com/s/files/1/0431/6522/1028/files/pijasak.pdf
    • https://cdn.shopify.com/s/files/1/0431/8255/5297/files/tegon.pdf
    • https://static.usrfiles.com/ugd/fd3290_c21a5f8aaf8342259dff3ad0f5fd5e24.pdf
    • https://cdn.shopify.com/s/files/1/0433/5822/4549/files/56790633945.pdf
    • https://cdn.shopify.com/s/files/1/0435/2511/1972/files/fugufanavunemeni.pdf
    • https://cdn.shopify.com/s/files/1/0435/5211/2804/files/tazomidubuwubanumazile.pdf
    • https://static.usrfiles.com/ugd/4dd980_7e82a4ed70cd490f9c94ebe1bcedf376.pdf
    • https://static.usrfiles.com/ugd/b8c837_053808e8de0a4b62b6f65f7f8946bbac.pdf
    • https://static.usrfiles.com/ugd/b8c837_da0e981594ba4776892747714e25d664.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_off00006686.bin
4890ce7df01a33d1b0d5b1cbd788a219f43f3bbab2a5137dfe3b86b02d363b0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6686 5208 bytes
font_01_sfnt_off0000781a.bin
cb195283f33a749ae4813ccccf7c0a9ce373de6c2a936c498aa9c1d6589d91bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x781A 10060 bytes

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