Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c8b0f115f55c927…

MALICIOUS

PDF

46.6 KB Created: 2020-08-10 12:17:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e1fb8f5ecb0ee1130d5e46109619512 SHA-1: 2a7a9a7eae120c0401c94f958449712bb2e50839 SHA-256: 7c8b0f115f55c927cb81e282c26892dc20823fa0bb5f8a0c948a5112af615161
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that is also flagged as malicious. The presence of numerous links suggests an attempt to drive traffic to potentially harmful sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=ataxia+espinocerebelosa+tipos+pdf
    • http://files.countertourism.net/uploads/1/3/1/3/131380469/rapebirunasuse-fefubapubuw-dozapiza-lixames.pdf
    • http://dijej.popideas.org/uploads/1/3/1/3/131398140/guxodenisumiz_dimugirajafivat.pdf
    • http://vufakeg.thelordsnewchurchphiladelphia.org/uploads/1/3/0/7/130775432/wepelas_xaliledibivi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/7927/9527/files/bilangan_imajiner.pdf
    • https://cdn.shopify.com/s/files/1/0434/1379/9066/files/24952675330.pdf
    • https://cdn.shopify.com/s/files/1/0433/6903/7980/files/notiwozanizu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0403/5221/files/organismos_autotrofos_y_heterotrofos.pdf
    • https://cdn.shopify.com/s/files/1/0431/7826/2689/files/kexekurenezofebexap.pdf
    • https://cdn.shopify.com/s/files/1/0434/0183/8757/files/phonics_book_1.pdf
    • https://cdn.shopify.com/s/files/1/0438/2280/9250/files/libro_3msc_3.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/xujugofalogofiwivaf.pdf
    • https://cdn.shopify.com/s/files/1/0440/5071/0693/files/43987465257.pdf
    • https://cdn.shopify.com/s/files/1/0428/3239/6447/files/megazadirupurolenisa.pdf
    • https://cdn.shopify.com/s/files/1/0429/4000/6559/files/47859577692.pdf
    • https://cdn.shopify.com/s/files/1/0429/3486/1987/files/51376634346.pdf
    • https://cdn.shopify.com/s/files/1/0430/2969/2577/files/16539138376.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007735.bin
d927040d9baedd8c4f6e34a8725e7d29fc0a653c0a5fc153027c8f0a9c604707		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7735 5348 bytes
font_01_sfnt_off00008972.bin
57e4536388dcac71103978ef9eb439f419937c242c6eb78c2130a59c80670a48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8972 10420 bytes

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