Malicious PDF — malware analysis report

Static analysis result for SHA-256 21acc3153d5115e8…

MALICIOUS

PDF

41.7 KB Created: 2020-08-04 19:02:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c40a45e8b533bb7ac6a0ef60f61168be SHA-1: f23dcff4ea2cac96e0c016d9964636dbf04c7078 SHA-256: 21acc3153d5115e82c61e6697e7a2992b6a841f0db08ce4936a4113669a89d90
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.cc'. The document body, though heavily obfuscated, contains text related to 'feelings and emotions wheel pdf' and the malicious URL, suggesting a lure to disguise the malicious intent. The presence of numerous links and the critical redirector link strongly indicate a campaign to drive traffic to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=feelings+and+emotions+wheel+pdf
    • http://bulakidi.eventperfectionwales.co.uk/uploads/1/3/0/9/130969045/benoxitomuver-paraxanojosuku-solusokum-piwarugetisako.pdf
    • http://files.vance-smith.com/uploads/1/3/1/3/131398424/mugurozinorofod_repiretobu.pdf
    • http://files.cohenbrosracing.com.au/uploads/1/3/0/7/130775200/3999957.pdf
    • http://files.chenangobluesfest.org/uploads/1/3/1/4/131409794/virarufuke_rozoxujajubumi_tukupejuzito.pdf
    • http://files.scottishstevennyc.com/uploads/1/3/0/7/130739340/8830723bd01f6.pdf
    • https://cdn.shopify.com/s/files/1/0433/5560/3094/files/sunopugino.pdf
    • https://cdn.shopify.com/s/files/1/0435/1574/0314/files/recyclerview_in_fragment.pdf
    • https://cdn.shopify.com/s/files/1/0436/9884/7896/files/cape_girardeau_weather.pdf
    • https://cdn.shopify.com/s/files/1/0433/8522/5372/files/pebulesaduxobuge.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/40149013364.pdf
    • https://cdn.shopify.com/s/files/1/0431/9982/4032/files/busemoka.pdf
    • https://cdn.shopify.com/s/files/1/0432/0981/8272/files/muwefetok.pdf
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/zususedufolekosileguxanig.pdf
    • https://cdn.shopify.com/s/files/1/0431/7249/5524/files/39146782142.pdf
    • https://cdn.shopify.com/s/files/1/0435/4175/8101/files/pakufijizokofewagaguz.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/kixizug.pdf
    • https://cdn.shopify.com/s/files/1/0434/6209/9109/files/savior_lyrics_rise_against.pdf
    • https://cdn.shopify.com/s/files/1/0439/8258/6014/files/94918042977.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_off0000666e.bin
8a3530e21dc900a62ffbcfe910ffee14a0c156af1a2c0622bf889a794c7bd9cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x666E 5408 bytes
font_01_sfnt_off000078c8.bin
33be19257a73bd598634db276a7bb11faff804a5fd9e150ea3c448b488ab7234
pdf-font-stream PDF embedded font (sfnt) at offset 0x78C8 9724 bytes