Malicious PDF — malware analysis report

Static analysis result for SHA-256 078f9cff293a3938…

MALICIOUS

PDF

39.8 KB Created: 2020-08-18 15:24:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac286c47f8bdf102889bcdfb72b00bae SHA-1: 3c8e0718da6b647b2334ef439e548f7aa0d10c45 SHA-256: 078f9cff293a393884eb633d95bbab739e461b890f9e22daf0fe562d155ea973
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a link farm designed to manipulate search engine results. One prominent link redirects to malicious infrastructure, suggesting an attempt to lead the user to a phishing or malware distribution site. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs supports a social engineering attack.

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.cc/pify?keyword=fruits+and+vegetables+worksheets+for+toddlers
    • http://files.southatlantabirths.com/uploads/1/3/0/7/130775503/tabolufugawizidop.pdf
    • http://kejikove.clevelandpropshop.com/uploads/1/3/0/8/130874317/rasepo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/0118/2370/files/the_scrambler_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/9353/9478/files/lobumodutamilifisabuzux.pdf
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/67599272733.pdf
    • https://cdn.shopify.com/s/files/1/0433/3495/9263/files/7421220508.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7352/files/29430506692.pdf
    • https://cdn.shopify.com/s/files/1/0433/1978/7675/files/pdf_file_reader_software_free_download_for_android_mobile.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/tangerine_book_online.pdf
    • https://cdn.shopify.com/s/files/1/0437/7631/1453/files/peregizudegabemimukeze.pdf
    • https://cdn.shopify.com/s/files/1/0433/9613/7111/files/vantel_pearls_login.pdf
    • https://cdn.shopify.com/s/files/1/0432/5461/2123/files/funuvusotinepinorevo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/jujojurisopukofabu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/51639399055.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_off00005d53.bin
3a86aeb2a6150defd6f3f75abfe090ec4fa0720dd891d4cb67f8562f9cd92d5c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D53 5480 bytes
font_01_sfnt_off00007008.bin
52267b89f397d811b33a836059c861d8f7402fb39933911dbd59f3a541e9ac57
pdf-font-stream PDF embedded font (sfnt) at offset 0x7008 10088 bytes