Malicious PDF — malware analysis report

Static analysis result for SHA-256 0512c7b78af5d760…

MALICIOUS

PDF

49.2 KB Created: 2020-08-20 21:10:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bb209a4e81dfe0576cd53f062654aec SHA-1: 3b9ac891ef690e08981dc57f9aebdb40ff954b46 SHA-256: 0512c7b78af5d76048289c9149912df022b222ebe8d92818a58386f4451c51d1
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with at least one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be related to software downloads, suggesting a lure. The presence of a link farm and a malicious redirector indicates an attempt to drive traffic 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.ru/pify?keyword=apk+play+store+pro+apkpure
    • http://files.ronaldchaseauthor.com/uploads/1/3/2/6/132682819/fizugokefa_tukavexurag_siwewu_titisajana.pdf
    • http://files.bloominozzieclicks.com/uploads/1/3/1/4/131437421/vudak-lupelutaxuxe-waditug.pdf
    • http://files.johnhain.com/uploads/1/3/0/8/130874615/de5337d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0438/6881/5528/files/bizagi_manual_portugues.pdf
    • https://cdn.shopify.com/s/files/1/0440/6280/2070/files/joliseminumokilo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0538/6647/files/ponatebimevazetolexebojew.pdf
    • https://cdn.shopify.com/s/files/1/0435/6666/1800/files/kudigizojalotuzexedaki.pdf
    • https://cdn.shopify.com/s/files/1/0432/5398/9534/files/cgst_act_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/2619/4330/files/97186578159.pdf
    • https://cdn.shopify.com/s/files/1/0437/8106/2813/files/7477733425.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/22389167796.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61086590007.pdf
    • https://cdn.shopify.com/s/files/1/0431/3923/5989/files/types_of_biomass_energy_sources.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006147.bin
229c1af2a69d255bf9e383be15af38dd85a037050c937a1a47b1d069c6a59bb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6147 4696 bytes
font_01_sfnt_off0000715d.bin
6587861fc6351f23040adf185ca119172f6cfa134a47bfa5472c87ec15c6fac9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x715D 10128 bytes
font_02_sfnt_off00009453.bin
24abf38ebf240eca51c851efe5d1313da617e21f7682b7f9c2d6c8abb0f0e866		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9453 16256 bytes
font_03_sfnt_off0000a9d0.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA9D0 4324 bytes

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