Malicious PDF — malware analysis report

Static analysis result for SHA-256 52b3b180731c1dcc…

MALICIOUS

PDF

35.8 KB Created: 2020-08-12 07:03:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58e569d550572834875e0398f303325f SHA-1: 05559c55824ab1d53b7090aaa2db3b6dc841b82c SHA-256: 52b3b180731c1dccdd098c888b95a9ab51b58bf109a1134daf593631947bc535
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded external links, a technique often used for SEO poisoning or to direct users to malicious content. One of these links, 'https://ttraff.cc/pify?keyword=amasr+act+1958+pdf', points to a known malicious redirector. The document body itself is heavily obfuscated and contains what appears to be junk data along with some of the URLs, further suggesting a malicious intent to disguise the true nature of the 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.cc/pify?keyword=amasr+act+1958+pdf
    • http://files.spearwooduniting.org/uploads/1/3/1/8/131856713/de087587dd.pdf
    • http://files.forestvilleanglican.com/uploads/1/3/2/7/132740350/winasugoluvov.pdf
    • http://bogabeti.lightofchristgarden.org/uploads/1/3/0/7/130776485/8275ab34d99.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8401/files/jizewofijoma.pdf
    • https://cdn.shopify.com/s/files/1/0437/8283/2289/files/educational_psychology_meaning_nature_and_scope.pdf
    • https://cdn.shopify.com/s/files/1/0434/7016/0032/files/clinical_chemistry_marshall.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/92554400891.pdf
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/vigusevifoxa.pdf
    • https://cdn.shopify.com/s/files/1/0430/6563/9073/files/boxazak.pdf
    • https://cdn.shopify.com/s/files/1/0431/2409/7191/files/chp_traffic_incident.pdf
    • https://cdn.shopify.com/s/files/1/0452/2855/6445/files/88740535020.pdf
    • https://cdn.shopify.com/s/files/1/0434/4381/4556/files/45101320718.pdf
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/diwumos.pdf
    • https://cdn.shopify.com/s/files/1/0434/7949/8918/files/frequently_asked_synonyms_and_antonyms_in_ssc_cgl.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_off00004da4.bin
91274b68bd3f7c5db678a566b8cf94b112725f66abd745cf5509576273e32d77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DA4 5784 bytes
font_01_sfnt_off00006136.bin
17344edc12da13a4551b13806b47cea912ffe5d32c0bab20c73d7b299277e2d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6136 9820 bytes

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