Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fe3b24288200cd9…

MALICIOUS

PDF

39.4 KB Created: 2020-08-03 04:40:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63cb98bc0776fb7014f0ee74e2bc26a2 SHA-1: e9225105ec58a144fb025cd0618dc34bd99c6e25 SHA-256: 4fe3b24288200cd9076659799a21d49069b7b957f03e4dbc821d066da2cc2f5d
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=stewart+redlin+watson+precalculus+7th+edition+pdf', is designed to lure users by appearing to offer a textbook download. The redirector likely leads to further malicious content or exploits. The presence of numerous other links to Shopify domains suggests a link farm for SEO poisoning or traffic generation, further supporting the malicious intent.

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=stewart+redlin+watson+precalculus+7th+edition+pdf
    • http://files.ao-americas.com/uploads/1/3/1/3/131384468/livojatap.pdf
    • http://files.stoddensfarmcottages.com/uploads/1/3/0/7/130775342/4655372.pdf
    • http://files.franerized.com/uploads/1/3/0/7/130775221/6881459.pdf
    • https://cdn.shopify.com/s/files/1/0430/0580/4698/files/42137217331.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9160/files/71737690705.pdf
    • https://cdn.shopify.com/s/files/1/0431/6174/7605/files/7197849231.pdf
    • https://cdn.shopify.com/s/files/1/0429/2119/7724/files/jimazef.pdf
    • https://cdn.shopify.com/s/files/1/0433/6628/5462/files/43804534482.pdf
    • https://cdn.shopify.com/s/files/1/0429/4692/0615/files/taxililepuwekera.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/14286742610.pdf
    • https://cdn.shopify.com/s/files/1/0429/9295/9642/files/pesotulo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8199/0304/files/sexuboz.pdf
    • https://cdn.shopify.com/s/files/1/0433/3531/9711/files/21678472686.pdf
    • https://cdn.shopify.com/s/files/1/0431/0840/1316/files/biwijamoteduvewiwogisoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/5905/2706/files/55516293810.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004534.bin
be90f677a1dbdd2c5b61bea61ba8dd346e5d51a51c98ab621c29f21111cbeaa0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4534 5400 bytes
font_01_sfnt_off00005791.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5791 1800 bytes
font_02_sfnt_off0000601e.bin
436714840b36d6f45c7fb6f561c377c895bfc3afb41a0b53baf3ffccee4061ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x601E 9856 bytes
font_03_sfnt_off000081cb.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81CB 4324 bytes

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