Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b04325538ea09e8…

MALICIOUS

PDF

49.5 KB Created: 2020-08-15 00:04:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93daf3b3527d81ec1f9506c4dabed751 SHA-1: 3a479bc48071e851e2cba0a5f6234d5dcf236d9c SHA-256: 3b04325538ea09e8e3599c61e9f68dd711e4084e890ed11581482ee290862448
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a PDF link farm. One of the primary links points to a known malicious redirector. The document body, though heavily obfuscated, also contains the URL to the malicious redirector, suggesting an attempt to lure users to malicious content.

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=classification+of+entamoeba+histolytica+pdf
    • http://files.framingidentity.org/uploads/1/3/0/8/130814644/xulitajepe.pdf
    • http://files.x-ovarvs.com/uploads/1/3/1/3/131379268/e65616055017.pdf
    • http://files.northrouttpreschool.com/uploads/1/3/0/9/130968994/tomotirewekawo.pdf
    • http://files.southlandfamilyclub.com/uploads/1/3/1/3/131379371/e862cb.pdf
    • http://files.bubbleytrinkets.com/uploads/1/3/0/7/130738823/2e674f4ea19c4e.pdf
    • https://cdn.shopify.com/s/files/1/0437/1854/1480/files/the_aptness_of_anger.pdf
    • https://cdn.shopify.com/s/files/1/0428/0818/0895/files/99628678892.pdf
    • https://cdn.shopify.com/s/files/1/0432/3137/9624/files/govikawaboxareli.pdf
    • https://cdn.shopify.com/s/files/1/0438/2441/4882/files/delatuwuxixagej.pdf
    • https://cdn.shopify.com/s/files/1/0432/9255/7467/files/41712212800.pdf
    • https://cdn.shopify.com/s/files/1/0428/2816/9382/files/coordinate_geometry_formulas_for_jee_mains.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dedijadexurusefux.pdf
    • https://cdn.shopify.com/s/files/1/0436/2256/4000/files/business_progress_report_sample.pdf
    • https://cdn.shopify.com/s/files/1/0438/9571/8040/files/82163675057.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/31681306355.pdf
    • https://cdn.shopify.com/s/files/1/0429/2096/8358/files/daxofazi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3088/8094/files/basics_of_css.pdf
    • https://cdn.shopify.com/s/files/1/0427/3415/7991/files/bayesian_point_estimation.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://cdn.shopify.com/s/files/1/0

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000764b.bin
698874677209c0f451b8b816494b324d5a4819859f932d35dca207fc31e0d167
pdf-font-stream PDF embedded font (sfnt) at offset 0x764B 5352 bytes
font_01_sfnt_off0000884f.bin
e8144eb5f97f6ba36799c10e64fc02b9d18145cdb5637ce2abb0a599d1ddbc8d
pdf-font-stream PDF embedded font (sfnt) at offset 0x884F 9888 bytes
font_02_sfnt_off0000aa2d.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA2D 4324 bytes