Malicious PDF — malware analysis report

Static analysis result for SHA-256 f041528a5ce03c31…

MALICIOUS

PDF

45.6 KB Created: 2020-08-27 16:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f19c1349e14abdfe13ff6e07cc8be94 SHA-1: f22597a14e503565b84ddb9ef2a87bfaa7ebf402 SHA-256: f041528a5ce03c312de366d1ff38bfffcf0da591dc643cde6073fb91a7632f1b
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one identified as a malicious redirector. The document body and embedded links suggest an attempt to lure users to external resources, potentially for SEO manipulation or to serve malicious content. The primary malicious IOC is the redirector URL.

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=v75+program+pdf
    • http://files.newenglandbusinesscenter.com/uploads/1/3/0/7/130775506/zefedisot.pdf
    • http://files.opticalonlinestore.com/uploads/1/3/0/7/130738870/7ef4081.pdf
    • http://files.perfectbalancenutrition.org/uploads/1/3/2/6/132682745/fifus.pdf
    • http://files.ngssmichigan.com/uploads/1/3/1/4/131453432/404917.pdf
    • https://cdn.shopify.com/s/files/1/0440/0034/6270/files/8474716455.pdf
    • https://cdn.shopify.com/s/files/1/0431/4356/1376/files/tolen.pdf
    • https://cdn.shopify.com/s/files/1/0435/8720/7327/files/78779512223.pdf
    • https://cdn.shopify.com/s/files/1/0432/1152/2209/files/76194220945.pdf
    • https://cdn.shopify.com/s/files/1/0431/1551/1964/files/tireronewibiputuwesavatu.pdf
    • https://cdn.shopify.com/s/files/1/0440/4012/6614/files/37332321463.pdf
    • https://cdn.shopify.com/s/files/1/0431/1610/1798/files/verugepasamu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/74733105486.pdf
    • https://cdn.shopify.com/s/files/1/0431/0374/8263/files/75317498251.pdf
    • https://cdn.shopify.com/s/files/1/0433/1552/7833/files/dojumoxulugitusuvodoweper.pdf
    • https://cdn.shopify.com/s/files/1/0429/7523/2153/files/jubetoxekebemufupivukavu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5711/8374/files/kedexuxesobolaligemi.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_off000073af.bin
a32713b93a73c848d8518ed3548553702e138100f8328e76b5f6b4a0b6380342		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73AF 5320 bytes
font_01_sfnt_off000085be.bin
5cd93224e6248cd0a6586d9d8c04b7e39855070f9e2e4331cab1b91c570ffeae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85BE 10968 bytes

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