Malicious PDF — malware analysis report

Static analysis result for SHA-256 63eaf28f53b3f837…

MALICIOUS

PDF

50.4 KB Created: 2020-08-18 21:24:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91426b0bfebc249923c7cfce958a774b SHA-1: d9e6691c40da05f7235615b5eede302a7d3b6cf4 SHA-256: 63eaf28f53b3f83780a1b4e2d6b58dec294650322d5080a64c68f98485ed5c5e
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm designed to redirect users to malicious infrastructure. The document body, though corrupted, contains a URL that is also flagged as a malicious redirector. This indicates a phishing or scam attempt using a lure related to 'mobile legends'. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.ru/pify?keyword=mobile+legends+argus+guide+2018
    • http://wusosari.cascadesfuturity.com/uploads/1/3/1/3/131379485/860c1d6c552e.pdf
    • http://files.promise1000.org/uploads/1/3/0/9/130969277/tavibojoderurabuniz.pdf
    • http://files.goodtogosocial.co.uk/uploads/1/3/2/6/132695365/7742571.pdf
    • http://sewul.mhsdesigns.net/uploads/1/3/0/7/130775350/xatulenofi.pdf
    • http://files.emmalucyillustration.com/uploads/1/3/0/8/130874278/kevokamij.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/21527323946.pdf
    • https://cdn.shopify.com/s/files/1/0432/3786/7687/files/96927283521.pdf
    • https://cdn.shopify.com/s/files/1/0432/6018/2692/files/evaluation_of_pharmaceutical_aerosols.pdf
    • https://cdn.shopify.com/s/files/1/0433/6353/2951/files/25028034160.pdf
    • https://cdn.shopify.com/s/files/1/0449/9125/0591/files/cosmological_argument_for_the_existence_of_god.pdf
    • https://cdn.shopify.com/s/files/1/0433/7005/3784/files/36330038412.pdf
    • https://cdn.shopify.com/s/files/1/0434/6655/5556/files/yes_boss_full_movie_free_hd.pdf
    • https://cdn.shopify.com/s/files/1/0433/6196/0091/files/simabukabemugaduzavuz.pdf
    • https://cdn.shopify.com/s/files/1/0429/3387/8940/files/fexomax.pdf
    • https://cdn.shopify.com/s/files/1/0429/6769/5509/files/55752110483.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/11755859355.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d38.bin
353c26f2e10c39aed4dd3dba38e1620bc85643989cc053e4b10f234bd39e758f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D38 5656 bytes
font_01_sfnt_off00009081.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9081 1800 bytes
font_02_sfnt_off0000990f.bin
9767544c0057a7aab0a8489d3ce11b42df24167ae379877867d7700151a846be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x990F 10404 bytes

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