Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a007f0d56f40885…

MALICIOUS

PDF

47.8 KB Created: 2020-08-17 06:24:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 907ea71b0a4e929c0dd4c89c6413a528 SHA-1: e230d93aa853b5b791bdac880fbf0d82d5187f56 SHA-256: 6a007f0d56f4088589f9be3e6be61e3dcc65ae76522e95c5369830a6dc169d44
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as resume and cover letter formats, but the primary link redirects to a known malicious infrastructure. The document body itself contains obfuscated text and URLs, including the malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect the user to a malicious site, likely for phishing or malware distribution.

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=sample+resume+cover+letter+format
    • http://files.finalfinishdetailing.com/uploads/1/3/2/7/132710655/levin_linebedanelu_vidaki_vukadidi.pdf
    • http://xofag.discoelectroson.com/uploads/1/3/1/0/131071181/dulizewuwibimexa.pdf
    • http://files.porttouristpark.com.au/uploads/1/3/0/8/130814076/3155361.pdf
    • http://files.newtonwonder.net/uploads/1/3/1/1/131164168/0f4dd639f8b50.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1999/2222/files/mavofutubenenage.pdf
    • https://cdn.shopify.com/s/files/1/0440/7489/3477/files/social_psychology_kassin.pdf
    • https://cdn.shopify.com/s/files/1/0428/7237/3411/files/75629843050.pdf
    • https://cdn.shopify.com/s/files/1/0438/2942/8384/files/everfi_module_5_answers_final_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0437/5887/8872/files/wetodulip.pdf
    • https://cdn.shopify.com/s/files/1/0429/6628/6490/files/ayurvedic_medicine_book_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0437/3754/6917/files/rosidubewuvewafuwerafurup.pdf
    • https://cdn.shopify.com/s/files/1/0437/7175/6698/files/watch_inuyasha_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0450/4938/1022/files/alive_character_design.pdf
    • https://cdn.shopify.com/s/files/1/0432/9563/7659/files/35946929813.pdf
    • https://cdn.shopify.com/s/files/1/0435/3772/7637/files/josomata.pdf
    • https://cdn.shopify.com/s/files/1/0449/9308/5598/files/kubuzo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4041/5644/files/49482836813.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kiwovanigefuminif.pdf
    • https://cdn.shopify.com/s/files/1/0438/2133/4690/files/13484072736.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_off00007c82.bin
bb949d3b11bd4fa682daa4cdb19102f7b2cc29a648f677667adaa767c56d39b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C82 5324 bytes
font_01_sfnt_off00008e8b.bin
8fbe8b9904f04500a813c58431d33603ebbb9c1b08da9685e8c1cd497704090a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E8B 10396 bytes

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