Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5395f2b0526c2dc…

MALICIOUS

PDF

36.4 KB Created: 2020-08-08 20:59:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 772050b84e689eb8eb84d63c7dbd8fee SHA-1: d4b38995da9a98f54fbb0ae796f1e74a88884c37 SHA-256: a5395f2b0526c2dcf8025a6c12bda86b6e7e6523e033290cbefb55c2919381c9
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, many of which point to a redirector service. The document body text, though heavily obfuscated, contains a URL that appears to be a lure for educational material. This suggests the PDF is designed to redirect users to malicious sites, likely for further exploitation or phishing. No scripts were extracted from this sample.

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=10th+class+math+solution+pdf+punjab+board
    • http://files.tancheewah.com/uploads/1/3/0/7/130739022/puzole_xewusiletemutes_gised.pdf
    • http://files.krgriffiths.org/uploads/1/3/0/8/130874129/96dffd9.pdf
    • http://files.geographypods.com/uploads/1/3/0/8/130814397/gopevexi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2273/7830/files/nipimunojufopanomomi.pdf
    • https://cdn.shopify.com/s/files/1/0436/1856/6306/files/15993633899.pdf
    • https://cdn.shopify.com/s/files/1/0431/5630/8123/files/12605653198.pdf
    • https://cdn.shopify.com/s/files/1/0435/9097/5645/files/lerutabomekokikowuwaxudaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/6495/0945/files/mizabutilolotud.pdf
    • https://cdn.shopify.com/s/files/1/0432/5185/9616/files/pekatuza.pdf
    • https://cdn.shopify.com/s/files/1/0429/8702/8641/files/75494247985.pdf
    • https://cdn.shopify.com/s/files/1/0427/4244/8295/files/97176673537.pdf
    • https://cdn.shopify.com/s/files/1/0432/1126/0062/files/14456340688.pdf
    • https://cdn.shopify.com/s/files/1/0429/3387/8940/files/juzagekupakavewadefo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3387/7914/files/wumorudesifikedipu.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_off0000505c.bin
626326a30c221d411b22b6160a17961616c45c33690ee52800570bd8b4f93e77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x505C 5708 bytes
font_01_sfnt_off0000639a.bin
4fc8306aa470f04ba61181dff92639bc6b61b7bc623a7e96e8e838f61db648b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x639A 9660 bytes

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