Malicious PDF — malware analysis report

Static analysis result for SHA-256 711c99318f12e91c…

MALICIOUS

PDF

43.1 KB Created: 2020-08-08 09:20:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e2ea17de6041ddee241cc7b5a67a237 SHA-1: 973f7be6543ba14bc86a9140579d5e751e3b4609 SHA-256: 711c99318f12e91c02ed38fe53ff8d3e9a3d4b7281a0aacf9a8906d446139386
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service designed to obscure the final malicious destination. The primary malicious link identified is https://ttraff.ru/pify?keyword=brickmania+instructions+pdf, which is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains references to PDF downloads and the malicious URL, suggesting a lure to download further malicious content.

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=brickmania+instructions+pdf
    • http://files.thepeckperspective.com/uploads/1/3/1/4/131454816/dijituninin_vodatavenani_gevodu_pinijox.pdf
    • http://files.atallamdshop.com/uploads/1/3/0/9/130969497/lubujozi.pdf
    • http://files.trendyjewelsbymanish.shop/uploads/1/3/1/3/131398547/2905080.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fisebupujavilugux.pdf
    • https://cdn.shopify.com/s/files/1/0435/9333/4947/files/a_global_reference_for_human_genetic_variation.pdf
    • https://cdn.shopify.com/s/files/1/0428/1116/2790/files/xogekomuvenijamusifuxu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9986/4734/files/bamoradasatosugol.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/difasadoxaneromasuvakuxa.pdf
    • https://cdn.shopify.com/s/files/1/0440/4301/0198/files/swedenborg_ita.pdf
    • https://cdn.shopify.com/s/files/1/0432/5667/6510/files/zudujirajamekupipux.pdf
    • https://cdn.shopify.com/s/files/1/0433/9856/1957/files/saurashtra_university_b._com_sem_1_books.pdf
    • https://cdn.shopify.com/s/files/1/0439/8769/7822/files/razufurukirarapok.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_off00005c85.bin
e5388c7f5d8ae73eb22d81c7c4aeac46cfa7dd392799db16b68edb8bd60ce7a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C85 5144 bytes
font_01_sfnt_off00006de1.bin
3bfd80f03291090261371985687bd9ecc60db0eb7f6c7e60368d7f7268a1d1f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE1 10528 bytes
font_02_sfnt_off000091ea.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91EA 4324 bytes

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