Malicious PDF — malware analysis report

Static analysis result for SHA-256 3778aa81a773e6dd…

MALICIOUS

PDF

53.0 KB Created: 2020-08-25 13:23:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c34c2c17c45734d69cdb2c08cbbe1f11 SHA-1: 4450686dc89a34dbec6e0921c22e96021a5b850d SHA-256: 3778aa81a773e6dd0d3c1b9260bb194097c50587c24d691ab44ae1dc81688276
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a 'Monster Hunter World bow build guide'. This link, https://ttraff.com/pify?keyword=monster+hunter+world+bow+build+guide, leads to a link farm of numerous other PDF documents hosted on Shopify. The presence of a large number of external links and the malicious redirector strongly indicate a social engineering attempt to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=monster+hunter+world+bow+build+guide
    • http://silefe.jihyunhong.com/uploads/1/3/0/8/130814687/zizeginomuxavegi.pdf
    • http://files.healthexinternational.org/uploads/1/3/1/4/131406840/bosab.pdf
    • https://cdn.shopify.com/s/files/1/0434/0324/7781/files/oxford_word_skills_advanced_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/7038/2490/files/butterfly_valve_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/71778341766.pdf
    • https://cdn.shopify.com/s/files/1/0433/5550/4795/files/68872415725.pdf
    • https://cdn.shopify.com/s/files/1/0430/7153/7301/files/81234410713.pdf
    • https://cdn.shopify.com/s/files/1/0438/6160/6550/files/affairscloud_current_affairs_weekly.pdf
    • https://cdn.shopify.com/s/files/1/0430/0737/7567/files/bidenepurizexarexamelig.pdf
    • https://cdn.shopify.com/s/files/1/0429/0910/6335/files/97032828727.pdf
    • https://cdn.shopify.com/s/files/1/0433/3866/2053/files/vokezuxuvoxebajojif.pdf
    • https://cdn.shopify.com/s/files/1/0436/3865/3081/files/jesunoweruj.pdf
    • https://cdn.shopify.com/s/files/1/0431/0191/3244/files/gelubasabifu.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c6c.bin
a5409305544b777d18f77652aa2f2b22173eb5417a036fedc7867e58f40aa74f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C6C 5116 bytes
font_01_sfnt_off00007dda.bin
6e71eec1f6d458778d3d225485332b27010a4d4a65b96c23dc5e9b34d6012efc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DDA 16036 bytes
font_02_sfnt_off0000af52.bin
39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF52 16092 bytes

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