Malicious PDF — malware analysis report

Static analysis result for SHA-256 c648a4608a12c309…

MALICIOUS

PDF

42.9 KB Created: 2020-07-29 14:55:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bef0fd7553c2d2fe141abceac925f22 SHA-1: 4fb8960e4e782abc4f329864e5e1306edca64288 SHA-256: c648a4608a12c30926336156ff388111b1a1fe95fd41d34262ae3436001e7027
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link

The PDF contains a significant number of embedded links, identified as a PDF link farm. One of these links, 'https://ttraff.cc/pify?keyword=cambridge+a+level+accounting+past+exam+papers+pdf', points to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to academic papers, which is consistent with the link farm behavior. The primary attack vector appears to be directing users to malicious external sites.

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.cc/pify?keyword=cambridge+a+level+accounting+past+exam+papers+pdf
    • http://files.dianeliska.com/uploads/1/3/1/4/131407227/329453.pdf
    • http://files.swestend.com/uploads/1/3/2/3/132303351/kuwugubeni-motezijaxogefum-xebuk.pdf
    • http://files.dup-naz.org/uploads/1/3/0/7/130739376/2342559.pdf
    • https://cdn.shopify.com/s/files/1/0435/3346/7808/files/4102292851.pdf
    • https://cdn.shopify.com/s/files/1/0431/7783/6702/files/jitokawilagofawetuw.pdf
    • https://cdn.shopify.com/s/files/1/0429/9295/9642/files/bawutes.pdf
    • https://cdn.shopify.com/s/files/1/0428/7456/8860/files/bejozofutuvetozesuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gaxedisurerikemamezawapux.pdf
    • https://cdn.shopify.com/s/files/1/0432/8197/3416/files/bemaxo.pdf
    • https://cdn.shopify.com/s/files/1/0436/9815/9769/files/joxebuzovorapa.pdf
    • https://cdn.shopify.com/s/files/1/0434/3355/8168/files/97682671571.pdf
    • https://cdn.shopify.com/s/files/1/0432/3206/7748/files/10104872820.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4663/files/33609368362.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74808095599.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/
    • https://cdn.shopify.com/s/files/1/0433/0687/7

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e26.bin
a35dea602afe428bc53f64c0cdae58a388c25a05acdfc2f5e9f760ebad74ddc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E26 5648 bytes
font_01_sfnt_off00007145.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7145 1800 bytes
font_02_sfnt_off000079d2.bin
b61366970f84ceed838d7c415fbf0a401766e9de3a5afbe069d266ec230f4551		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79D2 10456 bytes

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