Malicious PDF — malware analysis report

Static analysis result for SHA-256 de3ffa3966dfcad3…

MALICIOUS

PDF

41.3 KB Created: 2020-08-20 03:50:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb190a0e882a465f8b0655762c979168 SHA-1: 386c75759ca468813db3dcff834cef6644832c0c SHA-256: de3ffa3966dfcad38a23340e1fc7b08438f509a5c38c0da57fe281b7f99879f1
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=garden+answers+app+for+iphone'. This URL is embedded within the document body, suggesting a social engineering lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm designed to obscure the malicious destination. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=garden+answers+app+for+iphone
    • http://files.sansmarket.co/uploads/1/3/0/8/130874001/6078365.pdf
    • http://files.lazewe2rt.com/uploads/1/3/1/4/131407435/8937158.pdf
    • http://files.bevpurduefineart.com/uploads/1/3/1/4/131453818/f6358b0.pdf
    • http://files.alissandratstoyan.com/uploads/1/3/1/4/131437619/pusidevakunetis.pdf
    • http://files.shenandoahebr.org/uploads/1/3/1/3/131379833/futisitiz_befibelesed.pdf
    • https://cdn.shopify.com/s/files/1/0435/8130/9083/files/economic_benefits_of_solar_energy.pdf
    • https://cdn.shopify.com/s/files/1/0439/3448/2587/files/fuperirajawajix.pdf
    • https://cdn.shopify.com/s/files/1/0431/7764/0092/files/matlab_wavelet_transform_image.pdf
    • https://cdn.shopify.com/s/files/1/0434/3998/0711/files/23562011194.pdf
    • https://cdn.shopify.com/s/files/1/0433/6317/2502/files/50449994997.pdf
    • https://cdn.shopify.com/s/files/1/0429/2545/7575/files/60554006268.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37237973095.pdf
    • https://cdn.shopify.com/s/files/1/0431/6410/6901/files/lemisetijalik.pdf
    • https://cdn.shopify.com/s/files/1/0429/7369/2063/files/17870049653.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_off0000641f.bin
9df1802f0c243af819877038a18a67d4a2703aa643b71405ad76fd0b9f85ba89
pdf-font-stream PDF embedded font (sfnt) at offset 0x641F 5220 bytes
font_01_sfnt_off000075f6.bin
e488922d9feae66261180f7a9fc05300cb08e9182cf625c8dfa59e06800bc19f
pdf-font-stream PDF embedded font (sfnt) at offset 0x75F6 10212 bytes