Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7dc4e4139293f14…

MALICIOUS

PDF

47.4 KB Created: 2020-08-12 01:50:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 894692bf7dd413c994b1d6a8acea4039 SHA-1: f407f0cb886fc368d09a590c2b824162d4571621 SHA-256: c7dc4e4139293f14f5cfdddae43367721fa7297a270a00ce71abe6668c5cde82
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, a technique often used to create link farms for SEO poisoning or to direct users to malicious sites. One of these links, 'https://ttraff.cc/pify?keyword=anemia+microcitica+hipercromica+pdf', is identified as a known malicious redirector. The document body itself is heavily obfuscated and contains what appears to be a URL, but it is not clearly discernible. 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.cc/pify?keyword=anemia+microcitica+hipercromica+pdf
    • http://files.coloradospringsspaandsalon.com/uploads/1/3/1/3/131384214/gufevizakobidis-takitabadit-xerikugorugemel-roxinijopifeva.pdf
    • http://files.yosukehashidate.com/uploads/1/3/1/4/131453215/gofevu.pdf
    • http://files.legitfitdesigns.com/uploads/1/3/1/8/131857199/teluxozipevij_bamemideban_raluset_ruredinumuwi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2041/9226/files/cancer_de_cuello_uterino_y_embarazo.pdf
    • https://cdn.shopify.com/s/files/1/0435/8609/3214/files/python_book_o_reilly_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/lasuvumekakulezitiwabine.pdf
    • https://cdn.shopify.com/s/files/1/0434/1805/8901/files/allaitement_maternel_inconvnients.pdf
    • https://cdn.shopify.com/s/files/1/0430/7304/4634/files/66762464687.pdf
    • https://cdn.shopify.com/s/files/1/0428/5300/7526/files/power_air_fryer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/10699911966.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/2347279829.pdf
    • https://cdn.shopify.com/s/files/1/0431/7147/9713/files/datun.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/tukosepaxim.pdf
    • https://cdn.shopify.com/s/files/1/0432/9163/9974/files/govolotiresera.pdf
    • https://cdn.shopify.com/s/files/1/0437/3712/0933/files/zezox.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_off00007c17.bin
4fa2f477daa79722af1d785a3011424b4cd92f1ccd9650d40ef043bacf3fb23c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C17 5176 bytes
font_01_sfnt_off00008d7a.bin
befcfef1e61937c63d25cd245d12704e6d5005f6528927a5a51ad0720632e487		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D7A 10376 bytes

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