Malicious PDF — malware analysis report

Static analysis result for SHA-256 e536dc9a967b3086…

MALICIOUS

PDF

54.1 KB Created: 2020-08-06 10:38:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57350d983a983ddea9b5dd41d3d0f56e SHA-1: 2cbd571fe5345ecc557bbb37cf6f0804e394a171 SHA-256: e536dc9a967b30869455fa198111b3255c6dc4ee6dc3e6a1e4c9c46b3b53e66c
120 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting a lure related to 'calisthenics exercises chart pdf' and includes the malicious URL. This indicates a phishing attempt designed to redirect users to potentially harmful content.

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=calisthenics+exercises+chart+pdf
    • http://files.wingsofhopemankato.com/uploads/1/3/1/6/131636941/zizab.pdf
    • http://jududozo.auroraleatherware.com/uploads/1/3/0/7/130739678/f1061e.pdf
    • http://files.gitxsansimalgyax.com/uploads/1/3/0/7/130775245/dijanebi.pdf
    • http://files.11pluscolchester.com/uploads/1/3/0/8/130873921/be1d40cc.pdf
    • https://cdn.shopify.com/s/files/1/0440/7197/7110/files/.pdf
    • https://cdn.shopify.com/s/files/1/0430/6753/9605/files/joburajenila.pdf
    • https://cdn.shopify.com/s/files/1/0432/8803/5486/files/25881483663.pdf
    • https://cdn.shopify.com/s/files/1/0430/8896/9882/files/16465145636.pdf
    • https://cdn.shopify.com/s/files/1/0430/3139/6503/files/factorio_red_circuit_blueprint.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/62903338530.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/31564202620.pdf
    • https://cdn.shopify.com/s/files/1/0438/5511/8501/files/81911916805.pdf
    • https://cdn.shopify.com/s/files/1/0429/3967/8886/files/telakifaxenijonoluzabuma.pdf
    • https://cdn.shopify.com/s/files/1/0427/5997/9174/files/30943454662.pdf
    • https://cdn.shopify.com/s/files/1/0432/8158/0200/files/87947073982.pdf
    • https://cdn.shopify.com/s/files/1/0428/5127/0823/files/vazafolebolatakogunozure.pdf
    • https://cdn.shopify.com/s/files/1/0433/8706/0375/files/35807816553.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_off000077ce.bin
b57ecfa2945436bbc417ef8ebcd50b5ce057f0ab5844a0718a23dd2358159d40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77CE 5216 bytes
font_01_sfnt_off00008983.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8983 1800 bytes
font_02_sfnt_off00009211.bin
caddd3ceadd3dc0ad7b58eb0debd425d72787381a06e057ef1194dbca17c9ade		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9211 10128 bytes
font_03_sfnt_off0000b4fd.bin
531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4FD 16312 bytes

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