Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcab694fba08a533…

MALICIOUS

PDF

126.7 KB Created: 2020-08-26 10:08:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c5e4eeac2397bb4cd2d5097756750c97 SHA-1: 0e8421ae56e1a2cfa0eb989e304cb2301eaa6f81 SHA-256: fcab694fba08a5330a3aaefc396d6c0a7c2b817ecd6dd29befacc9da1fe3e60f
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lure users to a harmful site. The heuristic 'PDF_SEO_LINK_FARM' suggests a large number of outbound links, many of which are likely malicious or part of a link farm. The ML classifier also strongly flagged this PDF as malicious. The embedded URL in the document body, 'https://ttraff.ru/pify?keyword=nonverbal+behavior+in+interpersonal+relations+pdf', is the primary indicator of malicious intent.

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=nonverbal+behavior+in+interpersonal+relations+pdf In PDF document text
    • http://pusijoji.michelleponeleit.com/uploads/1/3/0/8/130814411/5394670.pdfIn PDF document text
    • http://vunages.streetfootballwales.com/uploads/1/3/0/7/130739892/vidika_ponudizofiduka_pevimit.pdfIn PDF document text
    • http://files.fresnotattooandbodypiercing.com/uploads/1/3/1/8/131871462/e24a8676e7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8073/6156/files/sarexobemiguvafubesi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39086675177.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7663/2214/files/44001292047.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2920/7957/files/wovekiragurode.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9075/6259/files/samsung_galaxy_a50_images.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7475/4462/files/metabolisme_vitamin_k_dalam_tubuh.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9183/5546/files/zasibiluliririsefapu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4994/2168/files/lotus_spreadsheet_file_extension.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3631/9639/files/lijuxas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2724/9826/files/aesthetic_value_of_biodiversity.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2366/2236/files/cereus_blooms_at_night.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B326 5300 bytes
SHA-256: eec0a70ca757061b63149a2a65f071386d7226fa9b9c6eaccf13c6afd5e4e727
font_01_sfnt_off0001c51d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C51D 12560 bytes
SHA-256: 7e835efae7b6202d07015f7494364d7db0c446734f1c1949a60e9d4bd35fda31

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