Malicious PDF — malware analysis report

Static analysis result for SHA-256 2015bf11f84f7ae8…

MALICIOUS

PDF

49.4 KB Created: 2020-07-26 20:51:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce4a6d012c317e4778cfc379698316c1 SHA-1: cc8b4f6cc3bca3a09657276bbc87c4474f1c0c82 SHA-256: 2015bf11f84f7ae898503aaa5fbdd32042f9440e3b98e7d775f6ade6196d758c
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious content. The document body suggests a lure related to 'video from twitter direct message', indicating a social engineering tactic. The presence of numerous links to Shopify domains, while some are benign, suggests a link farm used to obscure the ultimate destination or to improve SEO for malicious content.

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/pify?keyword=video+from+twitter+direct+message
    • http://files.lknailsandbeauty.co.uk/uploads/1/3/2/6/132681938/wovaxale.pdf
    • http://files.stephanielamprea.com/uploads/1/3/0/7/130776728/bb48b1e665c8814.pdf
    • http://files.silentvoices.org/uploads/1/3/1/3/131382330/zemetimetelawilaniro.pdf
    • http://files.mosim.org/uploads/1/3/2/3/132302993/5476439.pdf
    • http://files.wholebodylifestyle.com/uploads/1/3/1/8/131871439/venawumejivul_xokabugu_gurodo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5095/1066/files/10326180903.pdf
    • https://cdn.shopify.com/s/files/1/0430/4742/0066/files/pemobifufufomadasixidibo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7773/0464/files/38017864451.pdf
    • https://cdn.shopify.com/s/files/1/0431/5411/2672/files/45571259290.pdf
    • https://cdn.shopify.com/s/files/1/0440/1784/4382/files/budililajojedogawuwakoduk.pdf
    • https://cdn.shopify.com/s/files/1/0435/4621/4564/files/24997096327.pdf
    • https://cdn.shopify.com/s/files/1/0434/5747/8823/files/depagivinegironupu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6594/1922/files/tojijepixikawuvodojubat.pdf
    • https://cdn.shopify.com/s/files/1/0431/7783/6702/files/jagabomixerinimozige.pdf
    • https://cdn.shopify.com/s/files/1/0432/1440/5793/files/gegudobekatosefipexakiga.pdf
    • https://cdn.shopify.com/s/files/1/0429/5468/6617/files/mosoxula.pdf
    • https://cdn.shopify.com/s/files/1/0435/8642/0893/files/gekolosogifab.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_off00007adb.bin
b20e4d60a3df8ddc4dca4a6263c9c65deb5f731546507aded98fda43ea39fb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ADB 5048 bytes
font_01_sfnt_off00008c1b.bin
51a9fb98724f0a73e89e55355ba75a6bac09a1c331f675108903a4f4a3469232		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C1B 14020 bytes

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