Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3bc406a3bfc9042…

MALICIOUS

PDF

38.4 KB Created: 2020-07-08 23:49:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e19fadf470876d9ecb0f05768c073ba SHA-1: 219fb636d0491dcc1cbbff92b22276ae7532c58c SHA-256: a3bc406a3bfc9042a4f1af9ee051408aa0201298b54b9a924a425ee7271567ba
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 unrelated domains and appear to be part of a link farm designed to manipulate search engine results. One critical heuristic identified a redirector link to a known malicious infrastructure. The document body, while containing some seemingly relevant text, is heavily obfuscated and likely serves as a lure to these malicious links.

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=simplified%20wastewater%20treatment%20plant%20operations%20pdf
    • http://files.thecovenantschristandyou.com/uploads/1/3/1/3/131379434/94345039.pdf
    • http://files.gotangcoart.com/uploads/1/3/0/7/130739830/408760.pdf
    • http://files.truewealthfg.com/uploads/1/3/2/7/132710687/migejowo.pdf
    • http://files.teatroflorcandela.org/uploads/1/3/0/7/130775275/nijibakasutoxa-xexivetemajan-jibakul.pdf
    • http://files.kilmartin.com/uploads/1/3/0/8/130813546/wotumojozit-dobokisidodaj-naniserawaw.pdf
    • http://files.thesilkfamilyproject.com/uploads/1/3/1/4/131437740/livig.pdf
    • http://files.diabetest1ireland.com/uploads/1/3/1/8/131872285/3740429.pdf
    • http://files.gilliantorckler.com/uploads/1/3/0/8/130874629/gomenevidi-kinepowa-xasokipa-xupuzateseroji.pdf
    • http://files.stephendsenturia.com/uploads/1/3/1/4/131437531/lemotorexopinafuliji.pdf
    • https://fabetitebol.files.wordpress.com/2020/06/tivaxobawuxalaji.pdf
    • https://riduvetixaxu.files.wordpress.com/2020/06/rizakotugodumixodefuw.pdf
    • https://gipegamufeka.files.wordpress.com/2020/06/zofulawamazuruxifetobuk.pdf
    • https://kenubid.files.wordpress.com/2020/06/matiripixawozevigevasilu.pdf
    • https://kipexot.files.wordpress.com/2020/06/nufevegukosimubimiki.pdf
    • https://feruvef.files.wordpress.com/2020/06/42552354016.pdf
    • https://bavorekivaso.files.wordpress.com/2020/06/xokitab.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39738284996.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/marifurozijuzaledenikegi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84312174386.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://bavorekivaso.files.wordpress.com/2020/06/xokitab

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005981.bin
38047440c28a483cae176fdeb6a9b9bc02e90cb0e96d2ae235d6e95f62ccdddc
pdf-font-stream PDF embedded font (sfnt) at offset 0x5981 5168 bytes
font_01_sfnt_off00006afe.bin
400fab594c9dce9d61d3f407b1711c322d6a1caf95a560f53d247affe2f73fa9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AFE 9704 bytes