Malicious PDF — malware analysis report

Static analysis result for SHA-256 02e394856d75c012…

MALICIOUS

PDF

36.7 KB Created: 2020-08-19 05:12:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8955113bfc27d4f4d15d65169dcf216 SHA-1: 8ead4c1a4af9043efaf2d6005c752b6ff646c534 SHA-256: 02e394856d75c0122413b9f713b2f398b633a9accce41c2f879dccccf24dfaef
154 Risk Score

Malware Insights

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

The PDF file contains embedded links that lead to a redirector service known for malicious activity. It also features a large number of links to external PDFs, suggesting a link farm or a method to obscure malicious destinations. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of malicious intent.

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=rangers+tv+guide
    • http://files.sethharrislaw.com/uploads/1/3/2/7/132712185/nalerufupej.pdf
    • http://files.momsrating.com/uploads/1/3/0/9/130969532/lobivizemiza_muzikenar_lemakodako_zubar.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/9845/4693/files/12817913325.pdf
    • https://cdn.shopify.com/s/files/1/0435/8366/8392/files/53510938298.pdf
    • https://cdn.shopify.com/s/files/1/0430/9667/0365/files/carbamazepine_davis.pdf
    • https://cdn.shopify.com/s/files/1/0439/4795/0248/files/24776484471.pdf
    • https://cdn.shopify.com/s/files/1/0432/6152/6166/files/xisimisiru.pdf
    • https://cdn.shopify.com/s/files/1/0448/4605/5586/files/flowchart_questions_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0427/9602/3975/files/60921746686.pdf
    • https://cdn.shopify.com/s/files/1/0435/8828/8675/files/9122250924.pdf
    • https://cdn.shopify.com/s/files/1/0437/3161/5909/files/48826955764.pdf
    • https://cdn.shopify.com/s/files/1/0437/8741/9806/files/6829241784.pdf
    • https://cdn.shopify.com/s/files/1/0437/5206/3125/files/portal_2_ending_song.pdf
    • https://cdn.shopify.com/s/files/1/0432/3685/1874/files/kalman_filter_matlab_example.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_off00005132.bin
4dcc11c8aa7926c0c6faa8748116b961668d73e2080a693e94b02875e2acd65e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5132 5028 bytes
font_01_sfnt_off00006266.bin
eccdc69573a62b808b7021d27da4562048e1f1ecee3b60600a7c9130a9570be2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6266 10620 bytes