Malicious PDF — malware analysis report

Static analysis result for SHA-256 742a8fa5f96358c5…

MALICIOUS

PDF

44.1 KB Created: 2020-08-25 05:11:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f76b187d9cc629142ed97330e091b1c SHA-1: 4998056ee976d110eaa28570353bf4b0301650ea SHA-256: 742a8fa5f96358c53acfce08e0f59fdcde471c7a05f019a7fb080c355d764bb4
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with one heuristic specifically identifying it as a PDF link farm. The primary malicious URL, 'https://ttraff.com/pify?keyword=bautagebuch+f%25C3%25BCr+handwerker+pdf', is flagged as a known malicious redirector. The document body, though partially corrupted, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs. The presence of numerous links points towards a delivery mechanism for phishing or malware.

Heuristics 3

  • 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.
  • 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=bautagebuch+f%25C3%25BCr+handwerker+pdf
    • http://files.honoraryislander.com/uploads/1/3/1/6/131606730/485963cb532edd.pdf
    • http://pabujex.bgiapts.com/uploads/1/3/2/7/132712253/8560879.pdf
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/changeling_2008_full_movie_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/1899/3307/files/bapareguridenimuraxof.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/nasuzavu.pdf
    • https://cdn.shopify.com/s/files/1/0438/0770/3201/files/bayesian_reasoning_and_machine_learning_2020.pdf
    • https://cdn.shopify.com/s/files/1/0438/2926/4546/files/lemagev.pdf
    • https://cdn.shopify.com/s/files/1/0429/3050/3846/files/25653845634.pdf
    • https://cdn.shopify.com/s/files/1/0429/0904/0803/files/kidowavuje.pdf
    • https://cdn.shopify.com/s/files/1/0437/9587/3949/files/68867587224.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9946/files/firujidopadotitariripuxas.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_off00005e58.bin
ef120be274b8efc07bc7e7468d9615cee1bc49a265606915b17a48b1bb5cb227		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E58 5396 bytes
font_01_sfnt_off00007083.bin
033b643c4a18c1174c91941d33809af8bde9c24f89c8ca5eca50190db1c0db0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7083 10676 bytes
font_02_sfnt_off000093d6.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93D6 4324 bytes

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