Malicious PDF — malware analysis report

Static analysis result for SHA-256 5df7342d0059608a…

MALICIOUS

PDF

47.1 KB Created: 2020-08-02 01:37:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e48f49787002b004ac66a0293525d0d SHA-1: fc6f3cc75f7925fc55acb9af40723f25f50865f2 SHA-256: 5df7342d0059608a4e2f621268628dfe9e78dd247bebedf47596e84ee0483ab1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm and a redirector to malicious infrastructure, disguised as a technical manual. The ML classifier strongly indicated maliciousness, and the embedded URLs suggest a phishing or scam attempt to redirect users to potentially harmful content. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=aisi+cold+formed+steel+design+manual+pdf
    • http://files.wisewomenofblaircounty.org/uploads/1/3/1/6/131636990/4ed9ecac8e9.pdf
    • http://files.marff.com/uploads/1/3/0/8/130874612/b702fa59.pdf
    • http://files.robspechtart.com/uploads/1/3/1/6/131637211/lupop.pdf
    • http://files.mountvistapersians.com/uploads/1/3/0/9/130969241/jezil-buliz-vivevinajuxonoz-fefevorikodeba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3042/9346/files/excavating_turtle_code_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8120/files/89609430639.pdf
    • https://cdn.shopify.com/s/files/1/0433/8194/8567/files/2972997515.pdf
    • https://cdn.shopify.com/s/files/1/0429/6704/0154/files/5271455672.pdf
    • https://cdn.shopify.com/s/files/1/0429/1959/2103/files/doxemizef.pdf
    • https://cdn.shopify.com/s/files/1/0427/5198/3783/files/wevuwonepidonaxoxokipis.pdf
    • https://cdn.shopify.com/s/files/1/0431/2065/6545/files/93646826279.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/difirevixazotu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6605/5063/files/62453934037.pdf
    • https://cdn.shopify.com/s/files/1/0428/3983/4780/files/38801882687.pdf
    • https://cdn.shopify.com/s/files/1/0430/7851/6885/files/my_roflcopter_goes.pdf
    • https://cdn.shopify.com/s/files/1/0438/0930/8829/files/vilel.pdf
    • https://cdn.shopify.com/s/files/1/0429/1110/5183/files/zabuzupazusanev.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a55.bin
6e002b4fcd0688f5b88a3ac8062e6f61cecee6e85bbe39600100c57816fa84a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A55 5464 bytes
font_01_sfnt_off00008cd4.bin
1c956ec2ffe81afe11d232f7264507277a2b8e54d149f40b6a42165b4292f217		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD4 10152 bytes

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