Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc3538888d4ad3fd…

MALICIOUS

PDF

55.7 KB Created: 2020-08-10 22:03:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7419ab45e6e9c613165c3512a612808a SHA-1: fa9487eaffa9abf8a3ba005e684d5ec1035a6d7c SHA-256: bc3538888d4ad3fdf4abf974231296bf08b9bb8f3e98c81a9bf45882daf7febb
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link farm and a malicious redirector. The primary malicious URL identified is https://ttraff.com/pify?keyword=asbabun+nuzul+surah+al+fatihah+pdf, which likely serves as a gateway to further malicious content. The document body itself is heavily obfuscated and contains metadata related to wkhtmltopdf, suggesting it was programmatically generated. 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.com/pify?keyword=asbabun+nuzul+surah+al+fatihah+pdf
    • http://lepaduv.greenvillecoc.org/uploads/1/3/1/1/131164250/6107882.pdf
    • http://files.vironit.us/uploads/1/3/1/4/131452938/wanidu_fimobem_tegitedufuv_baxuwed.pdf
    • http://files.barryboyce.com/uploads/1/3/0/7/130740512/d3866.pdf
    • http://files.diymandalastones.com/uploads/1/3/1/4/131454024/dixedizun-nilig-xipulalokuwat.pdf
    • http://fiwelu.rikakai.com/uploads/1/3/1/8/131856772/zofopajizoxu_bexuzowizos_bubexujowija_kubilivojoteg.pdf
    • https://cdn.shopify.com/s/files/1/0433/9708/7390/files/zubinunaxime.pdf
    • https://cdn.shopify.com/s/files/1/0431/4942/6845/files/58577564338.pdf
    • https://cdn.shopify.com/s/files/1/0433/0523/8688/files/after_study_novels.pdf
    • https://cdn.shopify.com/s/files/1/0435/6882/4488/files/2d_array_in_java.pdf
    • https://cdn.shopify.com/s/files/1/0429/7778/8057/files/hyundai_accent_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/datufezon.pdf
    • https://cdn.shopify.com/s/files/1/0433/7998/2492/files/supumofowa.pdf
    • https://cdn.shopify.com/s/files/1/0437/0294/3909/files/25781256449.pdf
    • https://cdn.shopify.com/s/files/1/0429/3551/7337/files/list_of_regions_and_provinces_in_the_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0428/9753/9231/files/kekelirup.pdf
    • https://cdn.shopify.com/s/files/1/0433/4193/8856/files/arp_spoofing_tutorial.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_off00007d23.bin
0944262834c4f53b03a323263444ca61021a2c988c740aca5e1309198f77b97c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D23 5308 bytes
font_01_sfnt_off00008f26.bin
362bb02f4e1931ea4cf85bd03c6aa87ec84147063f27fb18721eb1f43568325e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F26 10088 bytes
font_02_sfnt_off0000b1dc.bin
913df36d3f4d3b764395b14a0e4fc78f27a75eedb96a4c9ccaf8691fcb67b202
pdf-font-stream PDF embedded font (sfnt) at offset 0xB1DC 18724 bytes