Malicious PDF — malware analysis report

Static analysis result for SHA-256 64c69959bba6f44f…

MALICIOUS

PDF

41.1 KB Created: 2020-09-01 06:07:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c93648fe249bd8e72ebce550e9bdc61 SHA-1: 5bd77d5b76a558269e8c938ab3c10c48e2902965 SHA-256: 64c69959bba6f44fc2a787202ecfdfb7a38fd38aab46a10dc19d052e3991a6ef
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.me, which is indicative of a phishing or SEO poisoning campaign. The document also contains a large number of links to PDFs hosted on Shopify, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier 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.me/pify?keyword=angular+format+number+commas
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/4464/1685/files/89840156009.pdf
    • https://cdn.shopify.com/s/files/1/0438/2274/3712/files/age_of_wonders_3_guide_campaign.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nimapudusakodinufuzexive.pdf
    • https://cdn.shopify.com/s/files/1/0432/1126/0062/files/moore_clinically_oriented_anatomy_9th_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/0928/5024/files/viper_anti_plagiarism_software_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/3935/7093/files/chloroacetyl_chloride_msds.pdf
    • https://cdn.shopify.com/s/files/1/0431/4339/7525/files/bossa_nova_rhythm_patterns_piano.pdf
    • https://cdn.shopify.com/s/files/1/0435/3441/8075/files/pizepibumusizuwesisosinug.pdf
    • https://cdn.shopify.com/s/files/1/0430/6183/7981/files/mixepaxigetini.pdf
    • https://static.usrfiles.com/ugd/1a89c8_a0f305664e8a4004918c75a063014679.pdf
    • https://static.usrfiles.com/ugd/ba3095_d87298cae42c438cb43875edc2f49feb.pdf
    • https://static.usrfiles.com/ugd/1be480_a2ee5f767d954e278637f9d95a43cb2f.pdf
    • https://static.usrfiles.com/ugd/9d869b_a4275c2acc08401d915485ada8856bce.pdf
    • https://static.usrfiles.com/ugd/b8c837_7bcc34a0377846cb9b108c067d771ad2.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_off000060f4.bin
fa3f3521a160596421762d7b16071b582a8a6887123f822f12e16fbdf7d00020
pdf-font-stream PDF embedded font (sfnt) at offset 0x60F4 5328 bytes
font_01_sfnt_off00007305.bin
0fd9caf04aca8f63d6554a65bec4fa6fd35c0db6e5b88a65238215e97db29317
pdf-font-stream PDF embedded font (sfnt) at offset 0x7305 10776 bytes