Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cfdfd67c0f84384…

MALICIOUS

PDF

39.9 KB Created: 2020-08-21 10:29:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 185b1fb20183f602d98a32986cef9310 SHA-1: f0562ab2f5ab9c9361165eda85d820a032deae53 SHA-256: 7cfdfd67c0f843843cfa82ef0cc8594e36dd82e708f283df696408cf1fd5849d
152 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is a common technique for delivering malicious content. The heuristic firings indicate the PDF is designed as a malicious redirector and part of a link farm, likely to improve search engine ranking for malicious lures. The embedded URLs, particularly the one to ttraff.com, are flagged as malicious. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the lure.

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=beiimaan+love+full+movie+free++hd
    • http://files.loudounlyricopera.com/uploads/1/3/1/4/131455543/6504047.pdf
    • http://files.danielles-boutique.com/uploads/1/3/2/6/132682124/4332071.pdf
    • http://wagamo.royalgymnastics.com/uploads/1/3/2/6/132681490/fe629f0a8ecc.pdf
    • https://cdn.shopify.com/s/files/1/0431/5847/0816/files/52039749962.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23535065851.pdf
    • https://cdn.shopify.com/s/files/1/0428/3518/1734/files/84065322658.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/47025331038.pdf
    • https://cdn.shopify.com/s/files/1/0435/2560/3488/files/ruzoxebefiwumezezemo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5461/2123/files/bomidoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/5759/4016/files/66106319970.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/getegewokojusowoso.pdf
    • https://cdn.shopify.com/s/files/1/0434/8015/4269/files/pengertian_anamnesis_menurut_para_ahli.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8152/files/70094484513.pdf
    • https://cdn.shopify.com/s/files/1/0431/8937/1029/files/26681309577.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004993.bin
8a6e09dcf6cee581fc1bc6e9b25f93264f0791bf05c59684f2439ae9ea352a6a
pdf-font-stream PDF embedded font (sfnt) at offset 0x4993 5080 bytes
font_01_sfnt_off00005aaf.bin
2e669388f03e8d52fb8f115bd980d88267b184458a3cf5cbe313d9bfd57f53c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AAF 10104 bytes
font_02_sfnt_off00007d83.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D83 16164 bytes