Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd7ca2d237eedd9e…

MALICIOUS

PDF

47.2 KB Created: 2020-07-17 03:31:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5a3b9c7051507298dc0c3ccf7b723d0 SHA-1: b092117fca7bfff558a14fcbd68defeac94da5c0 SHA-256: fd7ca2d237eedd9efdbad2b2477e473e0ee66d65384c4c4dba33a8c0bd7b96ee
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic firing for a malicious redirector link. The document body is heavily obfuscated, but the presence of a link farm suggests an attempt to manipulate search engine results or distribute further malicious content. The ML classifier also strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/wb?keyword=spuds%20kutztown%20menu%20pdf
    • http://files.awakeningcenter.net/uploads/1/3/0/7/130738621/lujuzerevuvoni-kudipede.pdf
    • http://files.onlinemobiletrainer.com/uploads/1/3/0/7/130776266/4990596.pdf
    • http://files.mounthebronstem.com/uploads/1/3/0/7/130776268/movakexe-begujara.pdf
    • http://files.clockhouse-marnhull.com/uploads/1/3/0/7/130740363/jokezinodapevi_fisaguboga_nebuzatiganukut_xisar.pdf
    • http://files.athenscountystorage.com/uploads/1/3/1/4/131410812/fb11663c9.pdf
    • http://files.drbrettwade.com/uploads/1/3/0/7/130775049/gurenegino.pdf
    • http://files.legacyhealingretreat.org/uploads/1/3/0/7/130774962/4123166.pdf
    • https://vurivul.files.w
    • https://vurivul.files.wordpress.com/2020/07/20652129387.pdf
    • https://segilojogezu.files.wordpress.com/2020/07/2864201565.pdf
    • https://gitagadof.files.wordpress.com/2020/07/82165827264.pdf
    • https://dikoxitixi.files.wordpress.com/2020/07/672425739.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fiwowosilikaragufes.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58143530911.pdf
    • https://cdn.shopify.com/s/files/1/0434/0023/3110/files/nokajuvedakitomuvufidened.pdf
    • https://cdn.shopify.com/s/files/1/0428/0877/0726/files/zuwijuzekutobotonipemo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4015/3505/files/tewefa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93616534700.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3067/files/kisilijomi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7757/4551/files/11105671725.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4650/files/89553626584.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/79498631835.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_off00007bd6.bin
149a853b7c8514df7b65c1ec2b87daa45596c87fcd0344a70ad3e08e192fa2b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD6 4992 bytes
font_01_sfnt_off00008cdb.bin
40447925d29750d65d2c389ebd45ddc0e92f02cbd59215101e693b841dd1fd0e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CDB 10096 bytes