Malicious PDF — malware analysis report

Static analysis result for SHA-256 1482ce4d8d719489…

MALICIOUS

PDF

69.6 KB Created: 2020-08-07 23:34:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91e0418583cc7726bf554af69fe7453e SHA-1: f5a720ceae1799827eaa0ab25f4c8abaa50a0790 SHA-256: 1482ce4d8d71948931bb4d1d8db1c46351c811b759f88d5cab6761f0baaa6017
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to what appears to be a link farm designed to host PDF documents. One prominent link, 'https://ttraff.com/pify?keyword=anorexia+nervosa+books+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains the same URL, suggesting the primary intent is to redirect users to malicious infrastructure, likely for further exploitation or phishing.

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=anorexia+nervosa+books+pdf
    • http://files.directdoctors.org/uploads/1/3/0/7/130738769/19537f40cf58454.pdf
    • http://files.brphotography100.com/uploads/1/3/0/7/130739886/fd0cfee5.pdf
    • http://files.auramoore.com/uploads/1/3/2/6/132682655/6ac73c4e6524f26.pdf
    • http://files.bridgendgranite.com/uploads/1/3/1/6/131606313/pexoberixusomabam.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/0997/3147/files/19101602494.pdf
    • https://cdn.shopify.com/s/files/1/0437/2532/4439/files/classical_electrodynamics_jackson_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0437/0323/8811/files/fukogubewafonur.pdf
    • https://cdn.shopify.com/s/files/1/0432/0201/9487/files/83054803111.pdf
    • https://cdn.shopify.com/s/files/1/0432/1427/4720/files/mawizixepojebozozumelo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0315/8433/files/52962989986.pdf
    • https://cdn.shopify.com/s/files/1/0429/0176/6310/files/90629697413.pdf
    • https://cdn.shopify.com/s/files/1/0439/6492/4062/files/bruno_latour_laboratory_life.pdf
    • https://cdn.shopify.com/s/files/1/0427/9199/3500/files/revejamunoravewovu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9354/files/wejukusigufedunaxukera.pdf
    • https://cdn.shopify.com/s/files/1/0436/5071/1705/files/zuzewepawanekip.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38461358607.pdf
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/xuwimuteperelaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/8330/8962/files/litimavowadapazeno.pdf
    • https://cdn.shopify.com/s/files/1/0440/6041/0021/files/mosapoputowofuv.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_off0000d2ce.bin
28da0daea4fcc2740f68b74789f56c444262a72abf4282bd0b5d722b94f29a83		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2CE 5324 bytes
font_01_sfnt_off0000e4ff.bin
71a17c10bf80d88d0df321ff70f07271ceb0320404e9e32d6efcbd79ede7b90d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FF 10592 bytes

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