Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ca5c9feb118df49…

MALICIOUS

PDF

42.5 KB Created: 2020-08-20 23:09:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30051bfeb7b498263808b7f1f34a2725 SHA-1: b05151d1cb14727abfe71440aa40ad6458770ae3 SHA-256: 6ca5c9feb118df49f9bf0d7abb6ba19abfdbb1a351586cc19cd5a251b4d847f7
154 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, many of which point to external PDF files, suggesting a link farm or redirection strategy. The primary URL, 'https://ttraff.com/pify?keyword=pictionary+words+pdf', is identified as a malicious redirector, indicating an attempt to lead the user to harmful content. 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=pictionary+words+pdf
    • http://files.hungrybeargrazing.com/uploads/1/3/0/7/130776503/2ca9b3e1bd.pdf
    • http://files.sierpefrogs.com/uploads/1/3/2/6/132681307/7544323.pdf
    • http://deroxif.lighthousechurchathensny.net/uploads/1/3/1/6/131606255/d486d708.pdf
    • http://kotuvikan.kinzaariana.com/uploads/1/3/1/6/131636725/3020155.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/resozelofik.pdf
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/tozuxenidareramugena.pdf
    • https://cdn.shopify.com/s/files/1/0428/4337/3735/files/darusigepotezifeniwora.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2791/files/82546663400.pdf
    • https://cdn.shopify.com/s/files/1/0463/1127/6706/files/burnout_game_for_pc_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0432/8020/3944/files/belmont_primary_school_chiswick_ofsted_report.pdf
    • https://cdn.shopify.com/s/files/1/0427/4978/8327/files/journal_of_pediatric_hematology_oncology_case_report.pdf
    • https://cdn.shopify.com/s/files/1/0440/9311/2472/files/bupixifoj.pdf
    • https://cdn.shopify.com/s/files/1/0441/4128/1432/files/amarok_v6_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/2722/4986/files/epson_xp-_820_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/0595/0626/files/26435881807.pdf
    • https://cdn.shopify.com/s/files/1/0431/9884/0995/files/band_baaja_baaraat_movie_ringtone.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_off000067c0.bin
0058c1468e7f200939e7e4c0a3b414ac22f2cf50c1e282b37847a3fa4d0aaf9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67C0 5312 bytes
font_01_sfnt_off000079f0.bin
c7041109964e73971530037dc6ae3fa41d6eef4b4a3eea697a01197e387d2f31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79F0 10352 bytes

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