Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8bc77ba6e528d5b…

MALICIOUS

PDF

41.4 KB Created: 2020-07-10 09:26:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6fc4a38d4e318547f6117178c8a288c9 SHA-1: 66c40e23fc2074e1cb07e73068762f2f298ea9d7 SHA-256: e8bc77ba6e528d5ba4c9d1c659ac878e5ff9bac64bfb7ebde9673b23dfb4ed20
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One prominent link redirects to 'ttraff.ru', a known malicious redirector. The document body itself is minimal and appears to be filler text related to the topic of productivity and efficiency, likely to mask the malicious links. The primary attack pattern involves SEO spam and directing users to potentially malicious content.

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.ru/wb?keyword=difference%20between%20productivity%20and%20efficiency%20pdf
    • http://files.scentedgrove.com/uploads/1/3/0/7/130775364/736d015fa.pdf
    • http://files.omegafinance.com.au/uploads/1/3/1/4/131453045/vemewa-vilatuz.pdf
    • http://files.nanaikamalama.com/uploads/1/3/1/4/131407424/2325775.pdf
    • http://files.diamondjleatheroftexas.com/uploads/1/3/1/3/131380720/gomagutexej_zudeva_fusurojuf.pdf
    • http://files.latinforstudents.com/uploads/1/3/0/8/130814387/3024460.pdf
    • http://files.breedingforthefuture.com/uploads/1/3/2/6/132681566/sutavumuz.pdf
    • http://files.swoffordmd.com/uploads/1/3/0/8/130813557/dukodixago_puxamitego_jodipapipukiwix.pdf
    • http://files.elizabethkpetersonlab.com/uploads/1/3/1/3/131384789/sibufajoj-xuvini.pdf
    • http://files.instantcarappraisal.com/uploads/1/3/2/3/132302764/bumomexasugadag.pdf
    • https://zosalij.files.wordpress.com/2020/07/tovadaburodidaruke.pdf
    • https://zadedow817229965.files.wordpress.com/2020/07/25076439368.pdf
    • https://soxivili.files.wordpress.com/2020/07/787397293.pdf
    • https://kotosidimof.files.wordpress.com/2020/07/28587669179.pdf
    • https://bokisutedex.files.wordpress.com/2020/06/45897835480.pdf
    • https://vikuriwugapo.files.wordpress.com/2020/06/22333653860.pdf
    • https://defenim.files.wordpress.com/2020/07/74987976771.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/loxidunadubufurepetiverox.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mipin.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99289858455.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/romiket.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_off00006256.bin
b2c51b3bf61d7f62930e852e01e85799f279fbdd192e91fc22921e8ab6d9055a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6256 5212 bytes
font_01_sfnt_off00007435.bin
1375a1f922db25c4acc2d6741cb7215e6130a4baa04d767080e1df705c70b590
pdf-font-stream PDF embedded font (sfnt) at offset 0x7435 10496 bytes