Malicious PDF — malware analysis report

Static analysis result for SHA-256 196f01ad7bbbf155…

MALICIOUS

PDF

47.1 KB Created: 2020-08-30 02:04:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d73f09984b432190f5e8d4e41cb36de5 SHA-1: 2c510ac85623f118d6a11a1cd7496589e4a744ec SHA-256: 196f01ad7bbbf15563639ad75b30958a55414123b533fd8a73e1c2911513b7df
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, with the primary link pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated, but the presence of the malicious URL and the link farm heuristic suggest an attempt to lure users to a compromised site, likely for further exploitation or phishing.

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/wix?keyword=ati+ipx+400
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/7744/1438/files/kudelamu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4280/files/skf_rolling_bearings_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0429/7624/7971/files/64064596854.pdf
    • https://static.usrfiles.com/ugd/b8c837_b08ff53c2f6d423aa3e356dd50584849.pdf
    • https://static.usrfiles.com/ugd/409ca8_285decc7d69846689ea7fab07e7ac112.pdf
    • https://static.usrfiles.com/ugd/b8c837_c1c55af24b0a4521af701ff3025378bd.pdf
    • https://static.usrfiles.com/ugd/39cb9d_b13b03e259064c088c415d759ca8a86a.pdf
    • https://static.usrfiles.com/ugd/c3f88d_4fd93d27bbce48c2b4c11d6ebb037b1f.pdf
    • https://cdn.shopify.com/s/files/1/0432/5464/4894/files/gunalumivobije.pdf
    • https://cdn.shopify.com/s/files/1/0431/5018/0503/files/anticresis_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0437/5193/2065/files/jorali.pdf
    • https://cdn.shopify.com/s/files/1/0434/4446/9927/files/beguximoka.pdf
    • https://cdn.shopify.com/s/files/1/0438/0203/4336/files/41687417355.pdf
    • https://static.usrfiles.com/ugd/b8c837_de39db9160a14e5b852ed7e15ec69196.pdf
    • https://static.usrfiles.com/ugd/83b1b3_02e6e2a1e3b04207a8063fa0a575bc3f.pdf
    • https://static.usrfiles.com/ugd/b8c837_7ca9236a8cce4246a9ea33e387d48a58.pdf
    • https://static.usrfiles.com/ugd/de02f3_a420bb3aaae441d5b36490f66f772fce.pdf
    • https://static.usrfiles.com/ugd/74c34a_978a8bd5268e4a35a9591ef49f71e92b.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e6b.bin
24d2a932f4748b21067832142ddbd35bcb7ec632859884c97619a6c0e19eed83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E6B 4584 bytes
font_01_sfnt_off00007e1e.bin
e48e5ad567e2de69aa0e819e85f8cd7dde3b17322cba8baacf90b1598b6cb5d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E1E 15428 bytes

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