Malicious PDF — malware analysis report

Static analysis result for SHA-256 599d734fbf581b41…

MALICIOUS

PDF

37.6 KB Created: 2020-09-04 05:56:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d71f039245a31a72d09cff998497ee2 SHA-1: 6a336868d6dd1ca0a271f8ed68850faec79be905 SHA-256: 599d734fbf581b417f28a0100fe94c9f8e5adc8ddfda5353eb490c98799a515b
152 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure. Additionally, it contains a large number of external links, characteristic of a link farm, with the primary malicious link being 'https://ttraff.link/wix?keyword=esia+report+pdf'. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the malicious URL and a benign Shopify URL.

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.link/wix?keyword=esia+report+pdf
    • https://cdn.shopify.com/s/files/1/0431/5004/9446/files/86592715818.pdf
    • https://cdn.shopify.com/s/files/1/0432/1574/9281/files/non_alcoholic_cocktails_recipes.pdf
    • https://cdn.shopify.com/s/files/1/0437/5887/8872/files/vosulasijejilododotu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0516/5216/files/oecd_transfer_pricing_guidelines_interquartile_range.pdf
    • https://cdn.shopify.com/s/files/1/0439/0410/6651/files/vuvozove.pdf
    • https://cdn.shopify.com/s/files/1/0437/8234/0770/files/earth_science_13th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/4955/7917/files/ai_aoyama_queen_love.pdf
    • https://cdn.shopify.com/s/files/1/0434/6036/2392/files/algebra_2_review_packet_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0432/9160/7204/files/barotadopep.pdf
    • https://cdn.shopify.com/s/files/1/0437/6713/6408/files/jabariya_jodi_full_movie_watch_online.pdf
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/how_to_plot_cdf_and_in_excel.pdf
    • https://cdn.shopify.com/s/files/1/0429/1434/9215/files/fuwate.pdf
    • https://static.usrfiles.com/ugd/b8c837_0e26aba2fe3248e48108a57d43fa3a8c.pdf
    • https://static.usrfiles.com/ugd/2a2e94_f565c7b315c645338ba2da6643165992.pdf
    • https://static.usrfiles.com/ugd/7198c1_c53541c11fe741b2aba56fe796ab72ae.pdf
    • https://static.usrfiles.com/ugd/108936_eef07261f8e843e6ba38677cd9f3c7f9.pdf
    • https://static.usrfiles.com/ugd/221eaa_2f2ff9a2d10d461e9fed8315147dcf4f.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_off00005500.bin
dcd185eee3611205fe4b7c8f6c9e305b1f3d5fee07b2c1c5c4b2816ba26a9276		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5500 4960 bytes
font_01_sfnt_off000065f1.bin
270f95f25c513c5d6c09b1ece770ae1c1f55e099819fa40433d55052b9a2adaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65F1 10464 bytes

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