Malicious PDF — malware analysis report

Static analysis result for SHA-256 78b9f670f267b453…

MALICIOUS

PDF

34.6 KB Created: 2020-08-26 13:50:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1721b51f6979b2820663516251abb1d6 SHA-1: 93048bac5cd227978589f2d5967ada178cac676f SHA-256: 78b9f670f267b453d22f760aaff6d9ef7930a3c16fc091fd92f506b3477cb912
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded links, including a critical redirector link to ttraff.com, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains the malicious URL and references to popular media downloads, likely intended to trick users into clicking the malicious link. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=naa+peru+surya+bgm+download
    • http://waguzusi.emmihilger.com/uploads/1/3/0/7/130774993/najipufixuxosudupe.pdf
    • http://pejefa.achievewe.org/uploads/1/3/2/7/132740930/rogebapinatibo_bodebumirodi.pdf
    • http://files.reformactivismdesign.com/uploads/1/3/1/3/131383251/komuwilito.pdf
    • http://nefitima.earthchildbooks.net/uploads/1/3/0/9/130969679/wemipurelagizavik.pdf
    • http://bowuxo.fcsautomation.org/uploads/1/3/2/6/132680835/5a6870c8c014.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/1776/2973/files/67268934992.pdf
    • https://cdn.shopify.com/s/files/1/0433/7795/0881/files/rokulutobufapilot.pdf
    • https://cdn.shopify.com/s/files/1/0436/7931/8166/files/gta_vice_city_mobile_cheats_android.pdf
    • https://cdn.shopify.com/s/files/1/0431/4329/9234/files/cogat_practice_test_kindergarten_an.pdf
    • https://cdn.shopify.com/s/files/1/0440/1987/5998/files/alberto_moravia_boredom.pdf
    • https://cdn.shopify.com/s/files/1/0428/9432/7975/files/america_history_of_our_nation_textbook_online.pdf
    • https://cdn.shopify.com/s/files/1/0465/0772/0854/files/bibakefinuge.pdf
    • https://cdn.shopify.com/s/files/1/0436/4946/6526/files/vector_magic_key_gen.pdf
    • https://cdn.shopify.com/s/files/1/0431/5090/1402/files/daxuxifoluwebufigetepejaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/2625/9876/files/esc_guidelines_2020_valvular_heart_disease.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_off000047c6.bin
666d9942fb6e47caad0b70e00021628bb91067ded15d30987be24a51cd0ae892		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47C6 5580 bytes
font_01_sfnt_off00005aba.bin
8d3022efb17a69402937e5adda54d1ad5798c1cec39c38fdb043e851f1b14ecc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ABA 10056 bytes

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