Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdb9600403ee36db…

MALICIOUS

PDF

44.6 KB Created: 2020-07-30 03:36:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90e1f3ceb38f54a0c83e7e750b0d6001 SHA-1: e83ce115d20d8c92a5778d10a856ff9d19ee7210 SHA-256: bdb9600403ee36db8bf013a4ebc6e2e7eedf978a6d7725321a36333338318b6b
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. Additionally, it features a PDF link farm heuristic, indicating a large number of outbound links, with the first being to 'cdn.shopify.com'. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf and includes a title related to 'literatura concisa alfredo bosi pdf', which is likely a lure. The combination of these factors strongly suggests a phishing or malware distribution attempt.

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=literatura+concisa+alfredo+bosi+pdf
    • http://files.wearehopecommunity.com/uploads/1/3/0/8/130874620/wiwet-kukukuduv-lubapikejikaj-kagupaxagije.pdf
    • http://files.firefallseffects.com/uploads/1/3/1/3/131379115/4660776.pdf
    • http://files.robohounds.com/uploads/1/3/1/3/131379712/2d1cd1e.pdf
    • http://files.robohounds.c
    • https://cdn.shopify.com/s/files/1/0438/2287/4781/files/wegaviduzod.pdf
    • https://cdn.shopify.com/s/files/1/0437/9426/8320/files/wusipasezasukijumi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4309/4677/files/getakuzuxukedasalite.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8871/files/norajas.pdf
    • https://cdn.shopify.com/s/files/1/0431/8131/0101/files/goderufak.pdf
    • https://cdn.shopify.com/s/files/1/0429/5370/3590/files/64568202963.pdf
    • https://cdn.shopify.com/s/files/1/0432/0316/6370/files/bozorute.pdf
    • https://cdn.shopify.com/s/files/1/0436/1460/1378/files/72521924366.pdf
    • https://cdn.shopify.com/s/files/1/0427/8134/3900/files/12209013886.pdf
    • https://cdn.shopify.com/s/files/1/0431/5240/8742/files/pajoditobunazokapiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kiragin.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7189/files/sapitodokex.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_off00007432.bin
0238637f1275e714e5b2137cacc59c60d74161caea8163157b6d51ceed0120ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7432 5112 bytes
font_01_sfnt_off0000858f.bin
05db8bfceddcc61c8737742c33f975d9398a11b2ff880a9cf9555aeef26697b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x858F 9260 bytes

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