Malicious PDF — malware analysis report

Static analysis result for SHA-256 31c771c239b05580…

MALICIOUS

PDF

33.6 KB Created: 2020-08-11 08:01:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52131d194ccc49c774c6e7f4bd97b0ba SHA-1: 766cd37256dc5c4aa46bbe0c9cb87c26571423be SHA-256: 31c771c239b0558079baa658fc862c21031182019b0f065c5e9961071a852fb7
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that leads to the redirector. This suggests the document's purpose is to trick users into visiting malicious infrastructure by presenting itself as a harmless PDF.

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=papercraft+kereta+api+indonesia+pdf
    • http://tidibaris.michelleblanchette.org/uploads/1/3/1/6/131636725/gadalisukux-xokizarumujoju-mumosukobovo-dipofasa.pdf
    • http://files.andrewmoschetti.com/uploads/1/3/1/4/131482975/zefuwomiwuwemunidu.pdf
    • http://files.gslcs.com/uploads/1/3/0/7/130776267/kavorawurusu-tisolazebuf-wexunile-fekojijapituwol.pdf
    • https://cdn.shopify.com/s/files/1/0434/2022/1607/files/waxisatem.pdf
    • https://cdn.shopify.com/s/files/1/0428/2528/5798/files/21871610016.pdf
    • https://cdn.shopify.com/s/files/1/0431/0761/4882/files/kulesemaworedapitasafol.pdf
    • https://cdn.shopify.com/s/files/1/0432/3246/0960/files/59419517375.pdf
    • https://cdn.shopify.com/s/files/1/0428/3082/3583/files/67894539535.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sedafasejizal.pdf
    • https://cdn.shopify.com/s/files/1/0433/9888/9635/files/rotofusowurim.pdf
    • https://cdn.shopify.com/s/files/1/0429/0379/7913/files/40901989337.pdf
    • https://cdn.shopify.com/s/files/1/0433/7896/6686/files/lm741_op_amp.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4017/files/52613098747.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/71655948244.pdf
    • https://cdn.shopify.com/s/files/1/0437/8948/4189/files/zojikijaje.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_off00004622.bin
80044df395a1cb6b0f90a102effefa9ff3c72132a775a389fb444ef7b8b25faf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4622 5184 bytes
font_01_sfnt_off000057cb.bin
fd772d480fd4cab85d6c80ef80b5f06499a22466f12513612f3ee9e96ea7c9e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57CB 9840 bytes

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