Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d2e3b578ea99d70…

MALICIOUS

PDF

44.5 KB Created: 2020-08-03 14:22:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa479b21a66c54f2c845530ec0530979 SHA-1: c3657ada29074a8399daa9e52b582a2c9bf0e528 SHA-256: 2d2e3b578ea99d70be6f33e5e964dcf74d92ec33e8519ce4531c80dbdcef39c9
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with a primary malicious redirector URL disguised as a document title. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure for users searching for 'annotated bibliography apa format pdf'. The presence of multiple unknown and potentially malicious URLs suggests a broader distribution or redirection scheme.

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=annotated+bibliography+apa+format+pdf
    • http://files.unitashonor.org/uploads/1/3/0/8/130813732/6351428fe8.pdf
    • http://files.aisledoweddingservices.com/uploads/1/3/2/7/132740277/dogevonavar.pdf
    • http://xevareliz.lampleylaw.com/uploads/1/3/0/8/130813042/4160275.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/meragavafeduxilaxopuxaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/2328/6940/files/fugamovawexodakoxalokabem.pdf
    • https://cdn.shopify.com/s/files/1/0435/4326/5434/files/77149504333.pdf
    • https://cdn.shopify.com/s/files/1/0435/2537/4103/files/32668585858.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1637/files/powafujinixazoxul.pdf
    • https://cdn.shopify.com/s/files/1/0433/8044/1238/files/wugoj.pdf
    • https://cdn.shopify.com/s/files/1/0437/8309/4434/files/wumeberimaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/9728/3992/files/zudajuwadefozosanore.pdf
    • https://cdn.shopify.com/s/files/1/0429/6150/2374/files/69404571658.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_off000063be.bin
cce1a8d7e72597adb37e93ecffcf368a4ccac92c35b1a3299bb36ad6c3b8ec0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63BE 5296 bytes
font_01_sfnt_off00007592.bin
17c57d1ab7cb30ef5a1ae191f3960c89bd1e111337f3b2c58a992d66138b49b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7592 9832 bytes
font_02_sfnt_off000096f5.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96F5 4324 bytes

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