Malicious PDF — malware analysis report

Static analysis result for SHA-256 69005cb179484645…

MALICIOUS

PDF

39.0 KB Created: 2020-08-21 14:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dadb256bbbdbd7960ab3008279255868 SHA-1: a8725fc281f0fa5eb80bd3173503ad4648b46d39 SHA-256: 69005cb1794846451c7aca68ee8b022f219a80c7639fcf670376d0665b7e60d9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links, many of which point to a link farm designed to generate SEO traffic. One prominent link redirects to `ttraff.com`, a known malicious redirector. The document body, though partially corrupted, contains text related to a 'Harlem renaissance poetry worksheet', likely a lure to encourage clicks on the malicious links. The ML classifier strongly indicated maliciousness.

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=harlem+renaissance+poetry+worksheet
    • http://files.moremilestogo.com/uploads/1/3/1/0/131071063/kurotovovisonevaneb.pdf
    • http://gubojor.cicenvironment.ca/uploads/1/3/0/9/130969408/5d2ed101.pdf
    • http://xesij.trinityjamestown.com/uploads/1/3/0/7/130738765/1ed3b4310ff1.pdf
    • http://dupupani.valeriesplayhouse.com/uploads/1/3/1/6/131606490/zilatur_viwaxazetuk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/1540/5725/files/zopiwobifefab.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3353/files/47313309269.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zututekafufefosapebuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/4196/4710/files/61153583863.pdf
    • https://cdn.shopify.com/s/files/1/0445/3600/4767/files/xagekuvabuleranodak.pdf
    • https://cdn.shopify.com/s/files/1/0435/2026/2308/files/kalnirnay_calendar_2020_july.pdf
    • https://cdn.shopify.com/s/files/1/0432/1509/3924/files/sheets_meaning_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2946/2165/files/23938436420.pdf
    • https://cdn.shopify.com/s/files/1/0433/8984/5671/files/top_hd_wallpaper_sites.pdf
    • https://cdn.shopify.com/s/files/1/0434/2589/0466/files/24395393486.pdf
    • https://cdn.shopify.com/s/files/1/0434/7196/2269/files/zigozovifesopirirexuweje.pdf
    • https://cdn.shopify.com/s/files/1/0435/9805/3539/files/rijududodabikitated.pdf
    • https://cdn.shopify.com/s/files/1/0437/3735/0309/files/acet_syllabus_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/2556/3799/files/5_stages_of_grief_and_loss.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_off00005a46.bin
8aa42f45dea85958bddaefd9280b5612119d32e47d2ed548b40a8964ce38b3b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A46 5392 bytes
font_01_sfnt_off00006c7d.bin
53388bcfa9136011de3b84918f2742a93c7ae389ff677f9ca13c9e4396d5645c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C7D 10068 bytes

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