Malicious PDF — malware analysis report

Static analysis result for SHA-256 39eae60157a12f87…

MALICIOUS

PDF

47.1 KB Created: 2020-08-21 15:19:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b22b1e2379cf2763fba2d6dd853a8dd3 SHA-1: 251e94c8014f58e4caff980fac2439528bc1f598 SHA-256: 39eae60157a12f873765e0fff4c2d6da97bb413ddd69dc5233c78df382a0570d
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to containing a link farm with a high number of external links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector link. This suggests the primary purpose is to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=best+bubble+shooter+games+for+android+2016
    • http://files.shopgirlcookies.com/uploads/1/3/1/6/131606186/62d7b18dcea.pdf
    • http://files.celandscapers.com/uploads/1/3/1/8/131871462/jajoja.pdf
    • http://files.xaviermassart.eu/uploads/1/3/1/3/131384136/dilefamo_wuzog.pdf
    • http://files.incrediblemyronb.com/uploads/1/3/0/7/130775391/jejiveziriwade.pdf
    • https://cdn.shopify.com/s/files/1/0433/2004/9822/files/76416685649.pdf
    • https://cdn.shopify.com/s/files/1/0430/8008/9760/files/wupukikejafodikax.pdf
    • https://cdn.shopify.com/s/files/1/0432/5625/0525/files/tesisavalopona.pdf
    • https://cdn.shopify.com/s/files/1/0434/5679/0695/files/disawiw.pdf
    • https://cdn.shopify.com/s/files/1/0435/8239/0431/files/nibupakisamakop.pdf
    • https://cdn.shopify.com/s/files/1/0434/1543/7468/files/tetapugaxirikivutujuwilu.pdf
    • https://cdn.shopify.com/s/files/1/0463/4066/9602/files/guzekigunazakabuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/3159/3113/files/59830768415.pdf
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/xamuna.pdf
    • https://cdn.shopify.com/s/files/1/0433/9400/7191/files/27789702294.pdf
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/xofejepevavobezifofolul.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006071.bin
ac7446bf610337adc87809e139a20bbe502df676e14fcda611e0b38ec0e736f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6071 5992 bytes
font_01_sfnt_off000074aa.bin
a59c322672e35dbf28b08f5897f682d8e4edd546cd48480b35d20cc3c16798ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74AA 10636 bytes
font_02_sfnt_off0000993d.bin
b1c96b8ac35a75edf2185e1083bdd07fe3133323670fae1dff40f63ad20205d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x993D 16340 bytes

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