Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee4ae995da50e759…

MALICIOUS

PDF

46.6 KB Created: 2020-07-20 10:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7260f9cab1200b137c3f3b4f09c7ae40 SHA-1: e18d990f4fcc03c29921119db030dfc2d7caa481 SHA-256: ee4ae995da50e7593e3de1149a31cc3e3c6945c8fce5450d00c973d7fa311780
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.cc/wb?keyword=programming%20languages%20robert%20w%20sebesta%20pdf'. The document body, though heavily obfuscated, appears to be a lure related to programming books, likely to trick users into clicking the malicious links. No scripts were extracted from this sample.

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/wb?keyword=programming%20languages%20robert%20w%20sebesta%20pdf
    • http://files.candbcreative.com/uploads/1/3/0/8/130873781/fopexuv.pdf
    • http://files.clearhorizon.ca/uploads/1/3/0/7/130775199/4803881.pdf
    • http://files.staugustinereed.org/uploads/1/3/0/7/130775666/b63868.pdf
    • https://cdn.shopify.com/s/files/1/0430/2284/4067/files/kuwapoxamuxizafadexi.pdf
    • https://cdn.shopify.com/s/files/1/0427/9785/8972/files/gisuzug.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/nasilol.pdf
    • https://cdn.shopify.com/s/files/1/0434/2556/2785/files/32660158336.pdf
    • https://cdn.shopify.com/s/files/1/0431/8245/6981/files/dofaje.pdf
    • https://zejamiwi.files.wordpress.com/2020/06/wukajepazapuzer.pdf
    • https://biwapatevav.files.wordpress.com/2020/06/37432837638.pdf
    • https://gunilugozu602496905.files.wordpress.com/2020/06/1600536290.pdf
    • https://mixowunajux.files.wordpress.com/2020/06/15013015714.pdf
    • https://sesuxegu.files.wordpress.com/2020/06/45158457608.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31321710084.pdf
    • https://cdn.shopify.com/s/files/1/0432/3147/7922/files/javoxanivijab.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98572357872.pdf
    • https://cdn.shopify.com/s/files/1/0428/7502/7619/files/39750105051.pdf
    • https://cdn.shopify.com/s/files/1/0428/6880/1702/files/90208072115.pdf
    • https://cdn.shopify.com/s/files/1/0428/7404/4579/files/fasexixosofimenep.pdf
    • https://cdn.shopify.com/s/files/1/0437/9960/9505/files/vadepadovirase.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/
    • https://cdn.shopify.com/s/files/1/0434/2556/2785/files/32660158336

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007748.bin
0327e68f5ff29c7b5f00a26a1833068ddb100475cec6a48b5fd35fc1c99636a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7748 5476 bytes
font_01_sfnt_off000089d1.bin
ffaaa560021f76901d8027f02877b0fc693e5ef716f5d65e4a8101ec9a691fe2
pdf-font-stream PDF embedded font (sfnt) at offset 0x89D1 10336 bytes