Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce0bafc72518de14…

MALICIOUS

PDF

47.3 KB Created: 2020-08-09 15:18:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 748f699607dc16ad1417f81204322a8c SHA-1: db9d8c49ae791408eba87446c62073c3eba2f21c SHA-256: ce0bafc72518de14ba02cb4d83661b81d176716397b97dc1abd88235549cf5fe
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates a malicious redirector link to 'https://ttraff.ru/pify?keyword=libro+berenice+edgar+allan+poe+pdf', suggesting a phishing or malware distribution attempt. The document body itself is heavily obfuscated and contains what appears to be junk data, but also includes the malicious URL and references to wkhtmltopdf, indicating it was likely generated programmatically as part of a link farm strategy.

Heuristics 3

  • 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.
  • 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=libro+berenice+edgar+allan+poe+pdf
    • http://lojasa.puppetstringnews.com/uploads/1/3/0/7/130738914/sokibukemum.pdf
    • http://files.guntervolleyball.com/uploads/1/3/1/3/131381640/365623bf9fb.pdf
    • http://files.paws4acauseinvitational.com/uploads/1/3/0/7/130775978/wagatotej_narofonix_zidoritune.pdf
    • http://files.danfiorella.com/uploads/1/3/1/3/131381804/9795560.pdf
    • http://files.buckinghamcharitycup.co.uk/uploads/1/3/1/3/131398322/de97957cd7.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/646255477.pdf
    • https://cdn.shopify.com/s/files/1/0430/6714/6397/files/lezuxuper.pdf
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/digexewamegexomonegasuwi.pdf
    • https://cdn.shopify.com/s/files/1/0435/5427/5479/files/wotekipom.pdf
    • https://cdn.shopify.com/s/files/1/0439/3009/1688/files/affective_neuroscience_panksepp.pdf
    • https://cdn.shopify.com/s/files/1/0431/2950/3908/files/zexabumadelagop.pdf
    • https://cdn.shopify.com/s/files/1/0429/7624/7967/files/dudutivuzewiwaj.pdf
    • https://cdn.shopify.com/s/files/1/0436/5369/3593/files/gastrocnemius_strengthening_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0435/2435/8308/files/nolire.pdf
    • https://cdn.shopify.com/s/files/1/0428/4930/4732/files/71703475423.pdf
    • https://cdn.shopify.com/s/files/1/0429/8955/1770/files/siforusuvebexiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/5883/9198/files/44606795211.pdf
    • https://cdn.shopify.com/s/files/1/0432/3282/1412/files/81976965045.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_off00007bbe.bin
7641308ea5e2b7c1d26b0a82fd1edc4ea5506d0ee2537731a5432b6db9b02526
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BBE 5224 bytes
font_01_sfnt_off00008d97.bin
4634b98d27318cf9e4fd00fdbb6943e13b35449fa80d58ec7ef8ee1010412a98
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D97 10164 bytes