Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab28006b53ec61ba…

MALICIOUS

PDF

34.6 KB Created: 2020-08-03 15:50:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9eaa5513c935fac3c48be76266aebafe SHA-1: 00a4049cde4d7fa377d1a2e19f9e6348b68cef92 SHA-256: ab28006b53ec61ba197ce2aecd0c11ad3ad8d9e0b4a4fa919fd52089b827d5ab
128 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to ttraff.com. It also contains a PDF link farm heuristic, indicating a large number of outbound links, many hosted on cdn.shopify.com. The document body text, though heavily obfuscated, contains the same malicious URL and benign-looking PDF URLs, suggesting a lure to trick users into clicking the malicious link. The presence of a 'download button' heuristic further supports this social engineering tactic.

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.com/pify?keyword=possessive+adjectives+exercises+for+beginners+pdf
    • http://fenaniz.deboethiopia.org/uploads/1/3/0/8/130873804/6241e7fc56.pdf
    • http://files.rebuildinglauren.com/uploads/1/3/1/3/131380995/d54bab41c5.pdf
    • http://files.dopeceiling.com/uploads/1/3/2/6/132682883/wenegaxomax_dijunubawu_nuvibexibobaxi.pdf
    • http://files.venturecreationcafe.com/uploads/1/3/1/3/131383934/letewopebivigif_webimikozezo_fozapisagum.pdf
    • http://files.josemleyva.com/uploads/1/3/1/4/131453084/cd9f69cd.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/85905706755.pdf
    • https://cdn.shopify.com/s/files/1/0432/8305/4757/files/fubuvadedaxozaxedatu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/2283550224.pdf
    • https://cdn.shopify.com/s/files/1/0435/8265/2579/files/optics_eugene_hecht.pdf
    • https://cdn.shopify.com/s/files/1/0432/3164/1762/files/dikexidafokatakoju.pdf
    • https://cdn.shopify.com/s/files/1/0431/5863/4658/files/4762561614.pdf
    • https://cdn.shopify.com/s/files/1/0429/2342/5955/files/misaji.pdf
    • https://cdn.shopify.com/s/files/1/0435/6666/1800/files/dugovufuxitufutetoxafo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0958/8897/files/14388954915.pdf
    • https://cdn.shopify.com/s/files/1/0431/9268/0605/files/nurewurenoxa.pdf
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/59966474344.pdf
    • https://cdn.shopify.com/s/files/1/0430/4230/8250/files/directional_hypothesis_example.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85450973079.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8214/files/6696403532.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_off0000492d.bin
77012bd97083528d28271ae189f232d1073e5aa02faa51c8a6a657e787a21d7b
pdf-font-stream PDF embedded font (sfnt) at offset 0x492D 5636 bytes
font_01_sfnt_off00005c7b.bin
b5ee1131463dc624043bfba946f6d067c0e417c76cff86af13cc2bb843741720
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C7B 9500 bytes