Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f86487509be6f27…

MALICIOUS

PDF

53.3 KB Created: 2020-08-22 08:58:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8219572f6982c78b610585a3e0a94dc SHA-1: 19ca32afc6cb9c62d7a7e0b504f1a00962e8ccc9 SHA-256: 5f86487509be6f2738c7a3c5966ac2575bb47431ebb6346af16bc14cce07db1a
154 Risk Score

Malware Insights

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

The PDF document contains numerous links, including one identified as a malicious redirector, which is likely intended to lead the user to a phishing or malware distribution site. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags the URL https://ttraff.cc/pify?keyword=un+packaging+guidelines as malicious. The document body, though heavily obfuscated, contains references to packaging guidelines and embedded URLs, suggesting a social engineering lure.

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=un+packaging+guidelines
    • http://files.simplyskinessentials.com/uploads/1/3/0/7/130738657/b50a8.pdf
    • http://guvefap.ndsportschannel.com/uploads/1/3/1/3/131379478/wusogepesifefe-timevijatefa-tilijipozoki-xiwawaxariduki.pdf
    • http://tabaz.ctmeetingspace.com/uploads/1/3/1/3/131384442/9779495854cd6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/7197/7110/files/.pdf
    • https://cdn.shopify.com/s/files/1/0435/6702/2239/files/57701360521.pdf
    • https://cdn.shopify.com/s/files/1/0438/2857/6416/files/kifavemavibefuf.pdf
    • https://cdn.shopify.com/s/files/1/0427/8606/2495/files/murufepedifafakeluzapox.pdf
    • https://cdn.shopify.com/s/files/1/0440/2675/7270/files/bogexesitavavarenajidana.pdf
    • https://cdn.shopify.com/s/files/1/0432/7587/8564/files/jeguwetusizisefebaraxe.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/24598181440.pdf
    • https://cdn.shopify.com/s/files/1/0428/8829/8662/files/new_bongo_songs_2019.pdf
    • https://cdn.shopify.com/s/files/1/0433/8571/6886/files/tonuzupapuzigewapekapi.pdf
    • https://cdn.shopify.com/s/files/1/0427/4742/9031/files/formal_letter_writing_examples.pdf
    • https://cdn.shopify.com/s/files/1/0432/0188/8416/files/turen.pdf
    • https://cdn.shopify.com/s/files/1/0430/3113/4365/files/5316326027.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21883700101.pdf
    • https://cdn.shopify.com/s/files/1/0432/3390/2760/files/bypass_frp_apk.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_off00009179.bin
2534eb5426fcf057ddb62487692265f112d2a83b8c346869ef57ca3e490a1d22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9179 5200 bytes
font_01_sfnt_off0000a33b.bin
76ea1ad8b4b0168494d989fe63ff66fc8312e84be8ac71925369f1cfe090c75e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA33B 10836 bytes

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