Malicious PDF — malware analysis report

Static analysis result for SHA-256 db805054dbe83986…

MALICIOUS

PDF

39.3 KB Created: 2020-08-15 00:07:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32ea6d841d795c056debea07176ef1d2 SHA-1: fd7386f45851e563fee380251ffee1aada474cbf SHA-256: db805054dbe8398689d2969a35135f42ca303fb416d40cebaf2a1eab35248470
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=whatsapp++for+pc+windows+7+filehippo'. This indicates a social engineering attempt to trick users into downloading software. The document also features a large number of external PDF links, many hosted on shopify.com, suggesting a link farm for SEO manipulation to drive traffic to malicious sites. No scripts were extracted from this sample.

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.ru/pify?keyword=whatsapp++for+pc+windows+7+filehippo
    • http://pasoka.helenlangfordvoiceovers.co.uk/uploads/1/3/0/8/130814297/ximalajogebifa_xenawomuzejub_jufokimaz.pdf
    • http://files.tigersbball.com/uploads/1/3/1/3/131384635/ea555e48cf39d1.pdf
    • https://cdn.shopify.com/s/files/1/0437/3318/8759/files/filidupawinawerugum.pdf
    • https://cdn.shopify.com/s/files/1/0428/8443/2038/files/residential_landscape_architecture_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/2720/2205/files/sociologia_politica.pdf
    • https://cdn.shopify.com/s/files/1/0431/8298/1278/files/90308575657.pdf
    • https://cdn.shopify.com/s/files/1/0434/4230/7239/files/44000114341.pdf
    • https://cdn.shopify.com/s/files/1/0437/2591/4262/files/icao_annex_11_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/swg_commando_build.pdf
    • https://cdn.shopify.com/s/files/1/0431/1131/7658/files/29866281125.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_off00005ba6.bin
5d36da9fe93761ac613e90a376ba81f91c8b43a53e4493a22f90270e27235496		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA6 5428 bytes
font_01_sfnt_off00006e36.bin
937b508684d9dd4be429e27749065c64f0d83c1121ce4922aeb979fa9f019904		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E36 10080 bytes

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