Malicious PDF — malware analysis report

Static analysis result for SHA-256 5518e44674f761d2…

MALICIOUS

PDF

44.8 KB Created: 2020-07-14 03:49:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: bbca95edd18f84d016d4c3b1206b96b8 SHA-1: d1a8e4daabb6ead5800e52604d69d2f9133e23a2 SHA-256: 5518e44674f761d22a5e29ad533a6d69bf8baf146c83fc67492c746b72d56332
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains numerous links, with one pointing to a known malicious redirector (ttraff.com). The document body, though heavily obfuscated, suggests a lure related to 'Zealot wireless bluetooth headphones manual'. The presence of a link farm heuristic further indicates an attempt to distribute malicious content or engage in SEO poisoning. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wb?keyword=zealot%20wireless%20bluetooth%20headphones%20manual In PDF document text
    • http://files.allenlightshow.com/uploads/1/3/2/6/132682745/7d61264286bde.pdfIn PDF document text
    • http://files.willshowstopper.com/uploads/1/3/1/3/131383510/wufazax_lexow_tatutamiwuro_gajuwepu.pdfIn PDF document text
    • http://files.evictory108.com/uploads/1/3/1/3/131381900/zimovibaxotozu.pdfIn PDF document text
    • http://files.artz-rva.com/uploads/1/3/1/4/131453982/bbbfb0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/2223392945.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3015/1330/files/loramijiwupojar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8016/3227/files/famamupu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/medegatoxajidut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3636/8296/files/67689606166.pdfIn PDF document text
    • https://rokedumeze.files.wordpress.com/2020/07/roberemurozoda.pdfIn PDF document text
    • https://tegedow.files.wordpress.com/2020/07/govetajaxojafogof.pdfIn PDF document text
    • https://luxotamataxo.files.wordpress.com/2020/06/65766780154.pdfIn PDF document text
    • https://kemujemurer.files.wordpress.com/2020/06/sopus.pdfIn PDF document text
    • https://mifetaf234194639.files.wordpress.com/2020/06/89461367422.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemulubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemisavixazesunomezixe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21884581804.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/mogutewijubugalex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3033/2060/files/tugakezavogakoxatatajo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6680/9765/files/sepivimewubusapezulap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zorugeligix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9284441163.pdf?v=1594212706In PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F93 5268 bytes
SHA-256: 312ec769fd89b737710a32862cf5c4c63d4122469dce0e654d1d04fc5f21a5c9
font_01_sfnt_off0000814f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x814F 10572 bytes
SHA-256: 1a5d02312ce987d2aab621a3786721c6b34b4d4a06534b316e89bde5fb571999