Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec607af91be3de11…

MALICIOUS

PDF

46.7 KB Created: 2020-08-31 03:16:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de215c596299bedc798fb772d985b006 SHA-1: f7facfc0ae212d63e9416f90873aaf4a1d7be8c7 SHA-256: ec607af91be3de113f608181e6669a4c97a00211a5970c3bea4dec861384dc2c
152 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, embedding a large number of external links, many of which point to Shopify-hosted PDFs. One critical heuristic identified a link to known malicious redirector infrastructure at 'ttraff.com'. This suggests the document's primary purpose is to lure users into clicking malicious links, likely for further exploitation or phishing. No scripts were extracted from this sample.

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.com/wix?keyword=proyectos+de+robotica+para+ni%25C3%25B1os+pdf
    • https://cdn.shopify.com/s/files/1/0430/5456/3477/files/pikutusit.pdf
    • https://cdn.shopify.com/s/files/1/0439/5443/8302/files/mejojiwotasepexi.pdf
    • https://cdn.shopify.com/s/files/1/0435/8628/9832/files/zuperofi.pdf
    • https://cdn.shopify.com/s/files/1/0428/0877/0726/files/52818785739.pdf
    • https://cdn.shopify.com/s/files/1/0431/3730/2679/files/affairscloud_current_affairs_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/8570/8953/files/fadudupekex.pdf
    • https://cdn.shopify.com/s/files/1/0432/3957/1611/files/33812441373.pdf
    • https://cdn.shopify.com/s/files/1/0432/8580/7268/files/nebugerazuduxuguwox.pdf
    • https://cdn.shopify.com/s/files/1/0435/0512/3493/files/29901995708.pdf
    • https://cdn.shopify.com/s/files/1/0431/0453/4692/files/1040647460.pdf
    • https://cdn.shopify.com/s/files/1/0428/2515/4716/files/70029460801.pdf
    • https://cdn.shopify.com/s/files/1/0435/2416/1704/files/dfd_esquema_para_proyecto_de_sistema.pdf
    • https://cdn.shopify.com/s/files/1/0432/2348/2525/files/75175315201.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_off0000750e.bin
2f4b175efdcd89839a3c3f2d136f903b149e63514b371ad413c2600dd452b443
pdf-font-stream PDF embedded font (sfnt) at offset 0x750E 5572 bytes
font_01_sfnt_off000087c9.bin
8c004e33d786fac2171c70cf68f10b4fef62fdbf8b6581e80de41444e47c6412
pdf-font-stream PDF embedded font (sfnt) at offset 0x87C9 10900 bytes