Malicious PDF — malware analysis report

Static analysis result for SHA-256 72d5019a34b4e190…

MALICIOUS

PDF

53.6 KB Created: 2020-08-02 16:59:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5c87b8c072d2d12a9858d1bb818e83c SHA-1: aab62c9f49bdff1ead83ac8374c45a297cfd7508 SHA-256: 72d5019a34b4e190802de0010fe75ee674d321d4fa084bbb0043ff83cfb9b9ec
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a malicious redirector link. The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=c+color+interpolation'. The presence of numerous links, many hosted on Shopify, suggests an attempt to create a link farm or to obscure the true destination of the malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=c+color+interpolation
    • http://files.waikatopqg.org/uploads/1/3/0/7/130775373/9079060.pdf
    • http://files.healingher.co/uploads/1/3/0/7/130738636/rijejibuvu_xesiwukutuno.pdf
    • http://files.jasmineosler.com/uploads/1/3/1/4/131452867/jawitajatojegi-xurodewir-lovid.pdf
    • https://cdn.shopify.com/s/files/1/0428/1594/6911/files/nuxulopasekosumaxewar.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/jitukijubig.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/tuwowatozoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/5962/5627/files/pudolifo.pdf
    • https://cdn.shopify.com/s/files/1/0437/2440/6935/files/xowuroluxunik.pdf
    • https://cdn.shopify.com/s/files/1/0431/7442/8827/files/lurewetebaxabo.pdf
    • https://cdn.shopify.com/s/files/1/0427/6020/8540/files/zibawimebiwubavewoz.pdf
    • https://cdn.shopify.com/s/files/1/0429/7215/1959/files/65765731140.pdf
    • https://cdn.shopify.com/s/files/1/0441/2456/9752/files/40752059892.pdf
    • https://cdn.shopify.com/s/files/1/0433/0697/5382/files/vadinozavibumugutekomus.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kovutuku.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_off00007a07.bin
1252737da83e011def11c3012319391d59641ac9be74dfd1cec7758e7f97e29a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A07 4560 bytes
font_01_sfnt_off00008987.bin
5a2ab635706e96f324b1dafc653c1eaae1c9feebb00bb4c3ac16b04d6ff9804b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8987 16364 bytes
font_02_sfnt_off0000bbb1.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBB1 4324 bytes

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