Malicious PDF — malware analysis report

Static analysis result for SHA-256 47f4baaa98a35a95…

MALICIOUS

PDF

46.4 KB Created: 2020-08-08 18:44:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aad8364a65eb6ffa69b99d10db69a70d SHA-1: 41f3e34d58ba066fb8d7bac023db526e90fb6671 SHA-256: 47f4baaa98a35a95af451bc45a2eabb5f17fefbc8c859b93cf6e091dbf90dc71
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, a technique often used to create link farms for SEO manipulation or to redirect users to malicious sites. One of the primary URLs, 'https://ttraff.cc/pify?keyword=mapa+turistico+amsterdam+espa%25C3%25B1ol+pdf', is flagged as a malicious redirector. The document body, though partially corrupted, contains references to tourist maps and the PDF generation tool wkhtmltopdf, suggesting a lure to disguise the malicious intent. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=mapa+turistico+amsterdam+espa%25C3%25B1ol+pdf
    • http://files.bigdoginstallations.com/uploads/1/3/1/3/131381675/9a668bb90.pdf
    • http://files.powerofthecrossministries.com/uploads/1/3/0/7/130776363/tebofofoditaxu.pdf
    • http://files.gwcservices.org/uploads/1/3/2/3/132302992/tobewutasatofod_pafidulapikexik_metomu.pdf
    • http://xofuf.hopeinelgin.com/uploads/1/3/0/7/130738748/f4c08f8.pdf
    • https://cdn.shopify.com/s/files/1/0435/8035/8815/files/79953448660.pdf
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/14273116783.pdf
    • https://cdn.shopify.com/s/files/1/0430/5115/5618/files/99323914844.pdf
    • https://cdn.shopify.com/s/files/1/0439/4500/1115/files/skip_list_implementation_java.pdf
    • https://cdn.shopify.com/s/files/1/0434/4971/2806/files/35631900836.pdf
    • https://cdn.shopify.com/s/files/1/0427/6905/5911/files/xiwotepuxu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/sixagibitinukexed.pdf
    • https://cdn.shopify.com/s/files/1/0434/8697/0018/files/attitude_magazine_thailand.pdf
    • https://cdn.shopify.com/s/files/1/0439/0731/7912/files/kompres_file_ke_jpg.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7214/files/xisigupipojugopawawa.pdf
    • https://cdn.shopify.com/s/files/1/0451/4463/7605/files/eu_gmp_annex_1_draft.pdf
    • https://cdn.shopify.com/s/files/1/0436/4160/2198/files/samsung_wb_350_f_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/1729/8329/files/27136499599.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/
    • https://cdn.shopify.com/s/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069c9.bin
589171c5fbefdf440826b025a0eadff4271441b240e6761631ee0ecb87ca4eef
pdf-font-stream PDF embedded font (sfnt) at offset 0x69C9 5520 bytes
font_01_sfnt_off00007c37.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C37 1800 bytes
font_02_sfnt_off000084c5.bin
e49271b9c178a186e76f4e507e5733279749f08f9d2c8fecc5676e5ca8acb132
pdf-font-stream PDF embedded font (sfnt) at offset 0x84C5 11356 bytes