Malicious PDF — malware analysis report

Static analysis result for SHA-256 10e7820a2f140c6c…

MALICIOUS

PDF

54.8 KB Created: 2020-08-01 17:30:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62e87d45dea951a129533deb23f58df8 SHA-1: 33b5cce9397bafbb6fa798bdf14fe26de973a0bc SHA-256: 10e7820a2f140c6c6a2790a14b1677711caa16660500c2037c6db7c8e61b6a3f
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. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags the URL https://ttraff.cc/pify?keyword=sony+hbh+52 as malicious. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the structure suggests an attempt to drive traffic to malicious infrastructure, likely for phishing or malware delivery.

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.cc/pify?keyword=sony+hbh+52
    • http://files.classicaltocontemporary.com/uploads/1/3/1/3/131380985/bafelefaf.pdf
    • http://files.byobeez.org/uploads/1/3/0/7/130775023/lepawogoweveguj_jorozen_popejewisidadu.pdf
    • http://files.pastorbobnlnh.com/uploads/1/3/2/7/132710491/rizobanuku.pdf
    • http://files.development12508.com/uploads/1/3/1/6/131607522/vipine.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8606/1480/files/perorazuligivasotet.pdf
    • https://cdn.shopify.com/s/files/1/0428/5127/0823/files/volexoza.pdf
    • https://cdn.shopify.com/s/files/1/0437/0654/8377/files/free_website_hosting_2015.pdf
    • https://cdn.shopify.com/s/files/1/0433/4216/8218/files/37947439254.pdf
    • https://cdn.shopify.com/s/files/1/0435/5211/2803/files/nidutobirajetijen.pdf
    • https://cdn.shopify.com/s/files/1/0435/9490/7810/files/92452709066.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38608120386.pdf
    • https://cdn.shopify.com/s/files/1/0431/7433/0517/files/dejusaduvovigut.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vemuvuferakodumi.pdf
    • https://cdn.shopify.com/s/files/1/0436/6965/1606/files/tadawi.pdf
    • https://cdn.shopify.com/s/files/1/0427/8494/8380/files/nozaxegisiwafabonixajukew.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/kinolexerebitoletemonixe.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_off00008d8f.bin
b3a95b37fdced5f21919047005470208e09a53cd89e16db023ac5db36a682f88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D8F 4856 bytes
font_01_sfnt_off00009e29.bin
e4462a0cb96069cdd713588f6faeb2dd4c5adde4de8dbe7dfd145a2abd67da18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E29 15832 bytes

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