Malicious PDF — malware analysis report

Static analysis result for SHA-256 00f27ac60405bb13…

MALICIOUS

PDF

49.0 KB Created: 2020-08-31 09:51:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 084865399ef74448bc325996f89b6b5d SHA-1: dcfed35e2704ecb39661e0d008697ef353231bcf SHA-256: 00f27ac60405bb13e1d91b05f63a3a53976741e365b5958aef3e0616ddefb01f
154 Risk Score

Malware Insights

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

The PDF document contains a lure related to 'Lego tow truck instructions' which is a common tactic for social engineering. It embeds a malicious redirector link that leads to a link farm, likely intended to host further malicious content or phishing pages. The ML classifier strongly indicated maliciousness, and the PDF structure itself contained numerous external links.

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=lego+tow+truck+instructions
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5963/3559/files/crown_xls_1000_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/6666/1791/files/belt_and_road_initiative_for_win_winism.pdf
    • https://cdn.shopify.com/s/files/1/0448/0296/5665/files/copernicus_heliocentric_theory.pdf
    • https://cdn.shopify.com/s/files/1/0431/0587/8170/files/27089061892.pdf
    • https://static.usrfiles.com/ugd/e23fbb_3c47a3ea63d44a0f849c32ce04c24f5e.pdf
    • https://static.usrfiles.com/ugd/b8c837_075d1fa133e5444697efbaabab18666f.pdf
    • https://static.usrfiles.com/ugd/99afdc_c75b2c097a6148908899e499ddc33471.pdf
    • https://static.usrfiles.com/ugd/b8c837_bea8bb1f7d754495ae836f8540bd9eef.pdf
    • https://static.usrfiles.com/ugd/b8c837_a70e80a52f3a4c23bb7641c38ced28af.pdf
    • https://static.usrfiles.com/ugd/db1da1_4f683803f058488b9eb70ef938d33247.pdf
    • https://cdn.shopify.com/s/files/1/0434/2631/6455/files/immunisation_schedule_qld_2020.pdf
    • https://cdn.shopify.com/s/files/1/0437/7001/9998/files/mathematical_theory_of_communication_shannon.pdf
    • https://cdn.shopify.com/s/files/1/0434/5099/0753/files/garomafaxusuvo.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_off00007a9f.bin
0af2883bf8c0efddb6eb190dd4d8a838af372307c2f0b426dae3b745c174a8a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9F 4824 bytes
font_01_sfnt_off00008b39.bin
47b3022ce981f14446dfd39c46eb83c69af93fbf404e56902ed0123e211fb071
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B39 14044 bytes