Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b64ea6316417de5…

MALICIOUS

PDF

43.8 KB Created: 2020-08-23 12:20:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a69e77eb3a2abc70c7713f56f29e737a SHA-1: 670258243676bd47e3b112c582cb9fd91e6f30f6 SHA-256: 6b64ea6316417de52ca46828d2bda8b8aca2f1a1c13fa8eee2b3615f5932b336
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to redirector infrastructure. The primary malicious URL identified is https://ttraff.cc/pify?keyword=causes+of+unemployment+in+uganda+pdf, which is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to external malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=causes+of+unemployment+in+uganda+pdf
    • http://files.lappeusfuneralhome.com/uploads/1/3/1/6/131607103/likozodenote_newaber.pdf
    • http://pekogelig.vmccoynpcc.com/uploads/1/3/2/7/132740405/1dda018768a11.pdf
    • http://files.notronmfgsales.com/uploads/1/3/0/7/130776728/xopoxef-dugivibip.pdf
    • http://luginapok.realsynergycommercial.com/uploads/1/3/1/3/131378970/6016162.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/3033/2060/files/43215696423.pdf
    • https://cdn.shopify.com/s/files/1/0462/4872/2583/files/47979355800.pdf
    • https://cdn.shopify.com/s/files/1/0433/8499/5991/files/nakaxajurowidab.pdf
    • https://cdn.shopify.com/s/files/1/0433/4518/2888/files/17250554462.pdf
    • https://cdn.shopify.com/s/files/1/0433/3296/0409/files/affordable_housing_materials.pdf
    • https://cdn.shopify.com/s/files/1/0431/1587/2423/files/30876609687.pdf
    • https://cdn.shopify.com/s/files/1/0460/4185/8212/files/xazojisaguvotox.pdf
    • https://cdn.shopify.com/s/files/1/0434/3015/0300/files/pudusafus.pdf
    • https://cdn.shopify.com/s/files/1/0437/5016/2583/files/pavemuliludowibiwupen.pdf
    • https://cdn.shopify.com/s/files/1/0428/4760/0796/files/loan_application_form_download.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c64.bin
00bfdb6d8d0066ade016176625e8ada30194c65ac613bbb12ee4a668a747f279
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C64 5272 bytes
font_01_sfnt_off00007e52.bin
be5c80661e357c1e4e9dba087587c77f545b3da69b1d8701b3229921d4f60dde
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E52 10672 bytes