Malicious PDF — malware analysis report

Static analysis result for SHA-256 14396175aa25adcf…

MALICIOUS

PDF

51.9 KB Created: 2020-08-02 13:11:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba16ef9e1e0ab8246b397530a0f52c91 SHA-1: 44a84d051212942b85907e903805a5b5b158e133 SHA-256: 14396175aa25adcf96f409b7905a519c6351bbeaf60952e2187a217f146750b2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text suggesting a lure for a physics book download. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/wb?keyword=bsc%201st%20year%20physics%20practical%20book%20pdf%20download%20in%20english In PDF document text
    • http://files.macierenae.com/uploads/1/3/1/0/131070588/wulewove.pdfIn PDF document text
    • http://files.fittingroomligonier.com/uploads/1/3/0/8/130814672/sodumavasoso_sugenufefigu_tinivotosuna_sezomojodupebe.pdfIn PDF document text
    • http://files.our-simple-life.com/uploads/1/3/0/7/130738679/wumesemat-wupotesorotelew-jakesem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6649/8965/files/33627823868.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1800/2340/files/xavidobibipudupajabop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1610/1781/files/21845872178.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6078/1465/files/63531820146.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2843/8427/files/nenedupipipuzotogevij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4836/9319/files/mimemidubavaduxuse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3046/3142/files/lukarabata.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6939/1527/files/jopefuwivaxigu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2681/5895/files/60213528567.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/somevitagalexuwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4244/7261/files/46889038536.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6564/7002/files/66603663019.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d5a.bin
826a6d59ae80bed3d638f18cf9ae30503ae1153d97ff465a51c740d589f33ca9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D5A 5916 bytes
font_01_sfnt_off00007197.bin
35c0a746fcdf55e64f2ba55209f6a139fa5d4ea47dce36c63c78d1e6d66b29b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7197 3204 bytes
font_02_sfnt_off00007e88.bin
d97e055e11de589539a249dfdf9c15aca1e9caf4700104d1763a3a5d87d8f7f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E88 2320 bytes
font_03_sfnt_off000088da.bin
cf9a856cd20d84fe7f7fe02c45e5153cafcfcd256eeab411a817735240d84579		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88DA 10172 bytes
font_04_sfnt_off0000ab97.bin
207faf14306426b668b87aba0c9d447b8ba40b67f0f7b18660ffa0d3c8132265		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB97 16224 bytes

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