Malicious PDF — malware analysis report

Static analysis result for SHA-256 4578456efa2659b4…

MALICIOUS

PDF

54.8 KB Created: 2020-08-04 22:00:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 680aa8734fdf583a87b05377b5edefbf SHA-1: 73d13d06f8e7cf9983c91526e216979687ba0037 SHA-256: 4578456efa2659b4b429c5483cad3cc9e3181cc067411ac388bd8d832e270798
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a large number of embedded links, a technique often used in SEO link farms to manipulate search engine rankings or distribute malicious content. One critical heuristic flagged a link to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=list+of+latin+abbreviations+pdf'. The document body, though heavily obfuscated, contains this URL and other PDF links, suggesting a lure to external, potentially harmful, resources.

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=list+of+latin+abbreviations+pdf
    • http://files.silverrescue.org/uploads/1/3/1/3/131380128/dobafo_tananuxab_tumikub.pdf
    • http://files.vdm46.com/uploads/1/3/1/6/131637309/melapisuxadad_pedamanuset.pdf
    • http://files.gulnurozdaglar.com/uploads/1/3/2/3/132302913/38e83.pdf
    • https://cdn.shopify.com/s/files/1/0428/5274/5375/files/5510484081.pdf
    • https://cdn.shopify.com/s/files/1/0429/6579/4965/files/22558887539.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4025/files/tusufatopeladokutup.pdf
    • https://cdn.shopify.com/s/files/1/0438/0668/7394/files/calligrammes_apollinaire.pdf
    • https://cdn.shopify.com/s/files/1/0429/8866/7034/files/22727227655.pdf
    • https://cdn.shopify.com/s/files/1/0434/4394/5628/files/empty_world_sims_4.pdf
    • https://cdn.shopify.com/s/files/1/0432/5985/5012/files/35942415563.pdf
    • https://cdn.shopify.com/s/files/1/0429/7339/7145/files/44493113547.pdf
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/42329996976.pdf
    • https://cdn.shopify.com/s/files/1/0431/3877/7249/files/68505948548.pdf
    • https://cdn.shopify.com/s/files/1/0433/5943/6968/files/delete_messages_discord.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_off000098c3.bin
f12ca0118b02ac22e24b3e1cf3a8f9ee296a71ad92c9327ac01eef2acc5ba4be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98C3 5176 bytes
font_01_sfnt_off0000aa72.bin
8e2f8c22dea7c8808367e3a8a39cf8a4cbceb19f1f7dbd7b49ee44223463608b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA72 10616 bytes

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