Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a9b9b61d97992e2…

MALICIOUS

PDF

53.9 KB Created: 2020-09-20 08:54:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40ebbc20c3eecdcd6f4212be60413e03 SHA-1: 688f8ccb3ae9126ea30a89d465b45faefeff6668 SHA-256: 4a9b9b61d97992e29da80c1b391fc9cbba4322ac95cc087e31770e384b0e391d
128 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to benign Shopify URLs but one critical link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a 'Vivitar bluetooth clock speaker manual' and the URL 'https://ttraff.me/wix?keyword=vivitar+bluetooth+clock+speaker+manual', suggesting a lure to a phishing or malware distribution site. The presence of numerous PDF links, many hosted on Shopify, indicates a link farm SEO strategy to improve search engine ranking for malicious content.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.me/wix?keyword=vivitar+bluetooth+clock+speaker+manual
    • http://moferes.resumescripter.com/uploads/1/3/1/3/131383483/bapexu_gelodoxivoxi.pdf
    • http://files.rockmanindustries.net/uploads/1/3/0/8/130874110/minor.pdf
    • http://pesekokon.upscstudymaterials.com/uploads/1/3/1/4/131438245/674a4cb50e454.pdf
    • https://cdn.shopify.com/s/files/1/0432/1925/5456/files/mowawakevigoguka.pdf
    • https://cdn.shopify.com/s/files/1/0428/5412/1635/files/96216713538.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7679/files/nevejagez.pdf
    • https://cdn.shopify.com/s/files/1/0429/3846/6471/files/63863703455.pdf
    • https://cdn.shopify.com/s/files/1/0434/9739/0244/files/gizenujuzev.pdf
    • https://cdn.shopify.com/s/files/1/0435/1682/1672/files/28478852049.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/7485095273.pdf
    • https://cdn.shopify.com/s/files/1/0483/5485/3027/files/pedivugibabusidiguber.pdf
    • https://cdn.shopify.com/s/files/1/0430/7514/1783/files/tuvadis.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000878f.bin
9e71fabbe25b0c284434385b6face5c2989a5dfaf1796522c885fbd9e4646b24
pdf-font-stream PDF embedded font (sfnt) at offset 0x878F 5284 bytes
font_01_sfnt_off0000995d.bin
0f0d58d7eed34df2a386bb50cd44c83d15d5de14161c5a7e395b07b82e46d7cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x995D 10392 bytes
font_02_sfnt_off0000bce1.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xBCE1 4324 bytes