Malicious PDF — malware analysis report

Static analysis result for SHA-256 01da1ed606928732…

MALICIOUS

PDF

42.6 KB Created: 2020-08-15 16:01:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac4c36e0695a217b166747853b54b58d SHA-1: 0b03341d5371c3508f96eaf58a2a063a84cf9c54 SHA-256: 01da1ed606928732d2177a32b5ffb89c34f22c66e0af031f95c8f341c661828c
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary link to 'ttraff.com' identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'resumen reforma laboral 2019 pdf', suggesting a lure to disguise malicious intent. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of it being used for phishing or to deliver further malware.

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/wb?keyword=resumen%20reforma%20laboral%202019%20pdf
    • http://files.worldwarc.ca/uploads/1/3/0/8/130815095/xokevogetuwa.pdf
    • http://files.businessbcs.com/uploads/1/3/1/0/131070313/zijawofujolemaxisewa.pdf
    • http://files.gratefuldavecharters.com/uploads/1/3/0/7/130775135/9791504.pdf
    • http://files.jakob-lorber-australia.net/uploads/1/3/0/7/130739769/bobabo_zosuwem_diputubunufulo.pdf
    • http://files.lseffects.com/uploads/1/3/1/3/131379700/7892316.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3694/2231/files/kikofodusoge.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/97705577215.pdf
    • https://cdn.shopify.com/s/files/1/0439/7580/3038/files/10737981732.pdf
    • https://cdn.shopify.com/s/files/1/0434/7848/3096/files/learn_arabic_language_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0435/0532/0088/files/satonenowopirulazerado.pdf
    • https://cdn.shopify.com/s/files/1/0429/3020/8924/files/nonanojexodaximilogebev.pdf
    • https://cdn.shopify.com/s/files/1/0433/7192/1571/files/tajizekukuguk.pdf
    • https://cdn.shopify.com/s/files/1/0439/1688/6184/files/nusuxasa.pdf
    • https://cdn.shopify.com/s/files/1/0430/7304/4634/files/94671985395.pdf
    • https://cdn.shopify.com/s/files/1/0435/7927/7467/files/91636055747.pdf
    • https://cdn.shopify.com/s/files/1/0434/6406/5190/files/streamline_english_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/372842929.pdf
    • https://cdn.shopify.com/s/files/1/0430/0229/8521/files/volesofapoxizifuwubuzekir.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_off0000643e.bin
9d7fbef1da8596e9b466b591bdcdf22ad14bb7336338487c350b1e1139e9942b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x643E 5816 bytes
font_01_sfnt_off000077e4.bin
31895f9ba0adb7775944e02ad0dde432e0461719592ffbf74bdd66d2b9d1e6f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77E4 11056 bytes

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