Malicious PDF — malware analysis report

Static analysis result for SHA-256 23b6e17d6e00a1fc…

MALICIOUS

PDF

47.6 KB Created: 2020-08-08 01:12:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88452b72ff3e678bbac89781e7788d51 SHA-1: dcbe9023c30baefaae3a3941fdfd1988ae65bf74 SHA-256: 23b6e17d6e00a1fc17064d3cfc5344a68c279ce523d50ac830f699fd5d41ff7a
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=attendance+management+system+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The document body, though heavily obfuscated, contains text related to 'Attendance management system pdf' and the malicious URL, suggesting a lure to a malicious site disguised as a document. 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.ru/pify?keyword=attendance+management+system+pdf
    • http://files.animalclinicofchardon.com/uploads/1/3/1/3/131398374/sowireresibujebilix.pdf
    • http://files.loyallyiserve.com/uploads/1/3/2/6/132681464/9220382.pdf
    • http://files.ornamentlady77.com/uploads/1/3/0/7/130739218/nafom.pdf
    • https://cdn.shopify.com/s/files/1/0438/9706/1531/files/6201108482.pdf
    • https://cdn.shopify.com/s/files/1/0439/0649/8728/files/loponuditovipewibik.pdf
    • https://cdn.shopify.com/s/files/1/0433/4832/8603/files/negujinalekeromo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7920/5013/files/vazinosulotarolefib.pdf
    • https://cdn.shopify.com/s/files/1/0436/9770/1032/files/kuzivo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1561/8203/files/89370079391.pdf
    • https://cdn.shopify.com/s/files/1/0441/4147/8040/files/3141184116.pdf
    • https://cdn.shopify.com/s/files/1/0428/4448/7836/files/dewarexivixebanojegobi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4565/0586/files/dukara.pdf
    • https://cdn.shopify.com/s/files/1/0431/5188/4445/files/72030466088.pdf
    • https://cdn.shopify.com/s/files/1/0433/4131/6249/files/analysis_of_algorithms_an_active_learning_approach_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0439/3975/8235/files/kisixoputulotokopawa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e71.bin
3a5344852d5e9e481edaf1795f305f04ce7be1b2f2aa1547afa0649c69c16765
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E71 5068 bytes
font_01_sfnt_off00007f9b.bin
eb3782301c0ddaa076e17ff9d747a58e1685edce1c69c034966dd4e025943009
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F9B 10444 bytes
font_02_sfnt_off0000a353.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA353 4324 bytes