Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f72da9b04ca3eae…

MALICIOUS

PDF

42.6 KB Created: 2020-08-30 11:31:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32e6e63a8a9468b9fd85663fefc881a2 SHA-1: 6ad8d36ad8d0ce2a9927ee0a0a7da796d01aa02a SHA-256: 6f72da9b04ca3eae65d566ba6837d6efa1a3598c16cad4be2f03fa6eb34da072
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to known malicious redirector infrastructure, specifically 'https://ttraff.cc/wix?keyword=code+geass+fukkatsu+no+lelouch+full+movie'. Additionally, it hosts a large number of external PDF links, suggesting a link farm designed to attract traffic or distribute further payloads. The ML classifier strongly indicated maliciousness, supporting the heuristic findings.

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/wix?keyword=code+geass+fukkatsu+no+lelouch+full+movie
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/a44510_3828cfa0274a44dd8374b360983ba57f.pdf
    • https://static.usrfiles.com/ugd/e745be_2a469b54daca4ea89849bde40fe102f8.pdf
    • https://static.usrfiles.com/ugd/b8c837_5b43aa52fe5544a390e22e3d4a170f3b.pdf
    • https://static.usrfiles.com/ugd/b8c837_6fa801281d554b568b89f244f83bade6.pdf
    • https://static.usrfiles.com/ugd/b8c837_58cb417fc5a44158927dfaadcf54042e.pdf
    • https://cdn.shopify.com/s/files/1/0430/8851/1130/files/48212446140.pdf
    • https://cdn.shopify.com/s/files/1/0433/5016/3609/files/responsive_iframe_jquery.pdf
    • https://cdn.shopify.com/s/files/1/0441/0481/0648/files/durawele.pdf
    • https://cdn.shopify.com/s/files/1/0454/7405/4310/files/natalya_kovaleva_saradas_vip.pdf
    • https://cdn.shopify.com/s/files/1/0429/8529/1937/files/vomig.pdf
    • https://cdn.shopify.com/s/files/1/0449/6012/0991/files/dinamalar_news_paper_today_in_tamil_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5285/files/60231391106.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5206/files/80277196732.pdf
    • https://cdn.shopify.com/s/files/1/0431/0712/3357/files/essential_hypertension.pdf
    • https://cdn.shopify.com/s/files/1/0430/9119/8112/files/65581072791.pdf
    • https://cdn.shopify.com/s/files/1/0434/7969/5526/files/cisco_1921_series_router_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/3673/7699/files/cat_3126_specifications.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051b8.bin
b8651812adc7eeac8b45bc69fa3f80e7fb605f365733b6cd2332d657743c2cb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51B8 4688 bytes
font_01_sfnt_off0000620e.bin
7ea3341a668da38548d17a1218ce2c1d22261ab8e87d4ff984b28cb3c2a5fd19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x620E 5368 bytes
font_02_sfnt_off0000743b.bin
591bb3c41737d52da26d5afdb35fa2f0fd97d84d85e6d2e4f94b221b761b73c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x743B 13016 bytes

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