Malicious PDF — malware analysis report

Static analysis result for SHA-256 54a58d9f9f15c291…

MALICIOUS

PDF

41.5 KB Created: 2020-08-06 03:20:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4245f8bf114bae7d665b991439bc0b5d SHA-1: 28244e44e3511b675882f70bbe7a4f4249cdad28 SHA-256: 54a58d9f9f15c291ea62629ab4c791430bb3b65a7522e148f2e46876bb80f693
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, includes text suggesting a technical reference, which is likely a lure. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating a coordinated effort to drive traffic to malicious sites. The primary attack pattern involves using a seemingly legitimate document to trick users into visiting a malicious URL.

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/pify?keyword=algorithms+in+a+nutshell+a+desktop+quick+reference+pdf
    • http://files.naturalbirthingjoy.com/uploads/1/3/2/7/132741155/difigeluti_foxemudabi_fokomerom.pdf
    • http://files.caseworkproductions.com/uploads/1/3/0/8/130813985/pofosez-dodep.pdf
    • http://files.asyouwishuk.com/uploads/1/3/1/4/131454024/98bd4902cc6b.pdf
    • http://files.mycyberphile.com/uploads/1/3/1/3/131380467/lisetazufipesekizif.pdf
    • http://files.michaeljohnmccarthy.com/uploads/1/3/1/4/131453215/1307036.pdf
    • https://cdn.shopify.com/s/files/1/0438/4541/9173/files/zuwujaxanugeruwosexiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/2078/7613/files/76402031628.pdf
    • https://cdn.shopify.com/s/files/1/0435/3776/0408/files/21455173599.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19252536586.pdf
    • https://cdn.shopify.com/s/files/1/0437/8837/0077/files/60110179245.pdf
    • https://cdn.shopify.com/s/files/1/0429/9961/1553/files/retonavewarazasitekem.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wopeg.pdf
    • https://cdn.shopify.com/s/files/1/0427/8580/0358/files/92027584013.pdf
    • https://cdn.shopify.com/s/files/1/0431/7364/2406/files/essentials_of_statistics_triola.pdf
    • https://cdn.shopify.com/s/files/1/0429/5429/3402/files/wabiwigevoludogexi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1510/0840/files/ssc._nic._in_mts_result_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/8208/7588/files/xodanipoxaxun.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_off0000632d.bin
8791bc880e3f5973df5de14788ce4b05a2f218efb2fef08baf856f51b4bf5aa0
pdf-font-stream PDF embedded font (sfnt) at offset 0x632D 5748 bytes
font_01_sfnt_off0000768f.bin
b29c71754e811274d6277471ff7c7e60775e08d75c41fe6ae5a129efc04002a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x768F 10012 bytes