Malicious PDF — malware analysis report

Static analysis result for SHA-256 69bfb4e0d9fdafe0…

MALICIOUS

PDF

39.4 KB Created: 2020-08-29 17:48:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15daf65fd3175783e56df1e76393de31 SHA-1: fa6d98c63d01432f270bd0363ee3edc7bf457640 SHA-256: 69bfb4e0d9fdafe0074b7ae09951e0c004308fc04daa6bb69621645ac464fc54
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The document body itself contains the primary malicious URL and numerous other links that appear to be part of a link farm designed to obscure the malicious intent. The ML classifier also 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/wix?keyword=warner+theatre+in+torrington
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/1938/6526/files/nagolabegokalesagemorive.pdf
    • https://cdn.shopify.com/s/files/1/0439/4532/8808/files/clinical_examination_nicholas_j_talley.pdf
    • https://cdn.shopify.com/s/files/1/0430/6118/2617/files/netflix_internet_speed_report.pdf
    • https://cdn.shopify.com/s/files/1/0434/6019/8557/files/76823725735.pdf
    • https://cdn.shopify.com/s/files/1/0434/5895/3369/files/8012371058.pdf
    • https://cdn.shopify.com/s/files/1/0433/7506/7297/files/wuxewuvibi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5637/3659/files/mikulimomutorazefadu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4732/8664/files/alcohol_phenol_and_ether_ncert_solution.pdf
    • https://cdn.shopify.com/s/files/1/0432/6857/1294/files/gofaw.pdf
    • https://static.usrfiles.com/ugd/b8c837_15da5ebc1360471ab55a8ca19d7e0308.pdf
    • https://static.usrfiles.com/ugd/b8c837_e3a2922c4e134e8986225f52af941c85.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_off00005bd8.bin
8c0f0515d3c1ff6cb865c28ad26603bdef4654ddec67b528666fbee709b99fc5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD8 4752 bytes
font_01_sfnt_off00006c07.bin
ac5ae3c7129df835962064647a648f746c5fc2bd63548ee2061804034de2f65e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C07 10876 bytes