Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ace27b466e9a0b2…

MALICIOUS

PDF

44.5 KB Created: 2020-08-12 02:20:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a5a9b4d0ecee2b548f4d89da5584857 SHA-1: a79f582b224a04ead6887a51e6c4573e1c8f0b3f SHA-256: 4ace27b466e9a0b2b52414999b74559e2e874f690721864232c3f1bb765e42a6
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.ru. This indicates the document is designed to lead the user to a malicious site. Additionally, a PDF link farm heuristic was triggered, suggesting the document is part of a larger SEO poisoning or link distribution scheme. The presence of a 'download button' heuristic further supports the lure-based attack pattern. No scripts were extracted, but the embedded URLs and heuristics strongly suggest a phishing or redirection attempt.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=descriptive+analysis+of+quantitative+data+pdf
    • http://files.orangevalleycreations.com/uploads/1/3/2/6/132682282/timabu-fetagijusaro-zekubusupotew.pdf
    • http://mivukuwo.cultivatemusicstudio.com/uploads/1/3/1/4/131453177/kifesagosuloza-jumovukoduvewez.pdf
    • http://files.tres-chic-bridal.com/uploads/1/3/1/3/131383444/bekefapugudug.pdf
    • https://cdn.shopify.com/s/files/1/0433/4885/2904/files/82262708533.pdf
    • https://cdn.shopify.com/s/files/1/0429/4246/4163/files/37474987751.pdf
    • https://cdn.shopify.com/s/files/1/0431/6993/9612/files/84595217126.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nemevisofopanufu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7369/2063/files/comparative_superlative_adjectives_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0439/8209/4494/files/sakanikevoreke.pdf
    • https://cdn.shopify.com/s/files/1/0434/4607/5542/files/tunexupotab.pdf
    • https://cdn.shopify.com/s/files/1/0433/0808/9509/files/74089916614.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/xugera.pdf
    • https://cdn.shopify.com/s/files/1/0434/1104/6561/files/zejafepesajikukanagemes.pdf
    • https://cdn.shopify.com/s/files/1/0431/3058/5239/files/12078444116.pdf
    • https://cdn.shopify.com/s/files/1/0431/3694/2234/files/dotupeniteloziwekenufawar.pdf
    • https://cdn.shopify.com/s/files/1/0434/2215/4908/files/48460714665.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f93.bin
504b5fa09b3284864a3d8af9bae31c79036f4404bea20b89cf1a164b3cfb5591
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F93 5436 bytes
font_01_sfnt_off00008228.bin
9e5d1aee507e55c36e1a067b1296b4ce0efb843bd782182ee5d9e64aa4ead2b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x8228 10304 bytes