Malicious PDF — malware analysis report

Static analysis result for SHA-256 720ab49a8cfc9cff…

MALICIOUS

PDF

36.5 KB Created: 2020-08-24 15:56:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a41737a1b0438210d5a2b34f4a13cc72 SHA-1: ffa2a5f3cd1381d16e9a651f414ec7e5cea0f775 SHA-256: 720ab49a8cfc9cff687446dcd3e913d6d1947e10020035839ecddfcb68e77219
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the target URL and appears to be a lure related to countertop laminate sheet sizes. The presence of a malicious redirector suggests an attempt to lead the user to a compromised or malicious site, likely for further exploitation or credential harvesting.

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/pify?keyword=countertop+laminate+sheet+sizes
    • http://files.terraobscura.net/uploads/1/3/2/8/132814958/2992259.pdf
    • http://jisig.breathworkswellington.co.nz/uploads/1/3/1/4/131407552/nawatukibu_xolexesesesuxo.pdf
    • http://rudozabol.theyogafixbook.com/uploads/1/3/1/4/131437243/6541302.pdf
    • http://files.dao-flow.com/uploads/1/3/1/0/131070938/tagudisowinun_bosojilupo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/8577/5519/files/64670000603.pdf
    • https://cdn.shopify.com/s/files/1/0430/6318/1473/files/xekulonovo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8640/5022/files/pajotamikegibowodosaralop.pdf
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/logimaju.pdf
    • https://cdn.shopify.com/s/files/1/0437/2702/8375/files/43678818234.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/vufetibibodelubenejido.pdf
    • https://cdn.shopify.com/s/files/1/0438/4620/5602/files/76168090613.pdf
    • https://cdn.shopify.com/s/files/1/0436/9406/3770/files/35550088861.pdf
    • https://cdn.shopify.com/s/files/1/0428/2197/6220/files/bemanoribonorekaxovubu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6321/3209/files/cinema_4d_free_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0430/6056/0025/files/tasamufufifuvinumezuze.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/2306333073.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_off00005490.bin
f6e88a2d6f3b6c16cf9dd2380b0462e152bbbef305e0277b764e3da6dea05939
pdf-font-stream PDF embedded font (sfnt) at offset 0x5490 5012 bytes
font_01_sfnt_off0000656a.bin
6982bf2f21603422d6cbabded720e756564a5aa4a0463c00110d3af3816da2dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x656A 9412 bytes