Malicious PDF — malware analysis report

Static analysis result for SHA-256 6de6a9f0cb185353…

MALICIOUS

PDF

50.5 KB Created: 2020-08-21 06:25:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 274866750e7fb810eefe5e8088e78663 SHA-1: 5d11ea3ebb0b830fbc9cd1ec11371ff0a1d1f1b0 SHA-256: 6de6a9f0cb1853535c2356a45ab32c8571343ea2e972e7bb6c2187265de012a6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a prominent link that redirects to malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though partially corrupted, contains text related to 'Nord vpn cracked apk 2019' and the malicious URL, suggesting a phishing or scam lure. The presence of numerous external links, many pointing to PDF files, further supports a link farm or redirection strategy.

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=nord+vpn+cracked+apk+2019
    • http://jozelo.courtneytezeno.com/uploads/1/3/0/7/130776885/repef.pdf
    • http://files.jacktrelawny.com/uploads/1/3/1/0/131071114/ef7462434.pdf
    • http://files.angieskonacoffee.com/uploads/1/3/1/1/131164052/gufegivo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7723/7920/files/badminton_court_size_and_net_height.pdf
    • https://cdn.shopify.com/s/files/1/0432/5349/8019/files/73181809892.pdf
    • https://cdn.shopify.com/s/files/1/0437/6815/2216/files/isabel_marant_size_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/8450/5498/files/mixitopusisix.pdf
    • https://cdn.shopify.com/s/files/1/0432/2924/9694/files/translate_from_spanish_to_english_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/2286/7880/files/sel_limfosit_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/30023545192.pdf
    • https://cdn.shopify.com/s/files/1/0431/3654/9018/files/10333748839.pdf
    • https://cdn.shopify.com/s/files/1/0434/1350/4150/files/nuvenevasifadegumojonire.pdf
    • https://cdn.shopify.com/s/files/1/0437/0461/5066/files/gitirufajakexusebozonega.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007186.bin
756688b1d5ad009224de6d0eb98b7ef2cbd374379830fdf490f5255a6b7102cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7186 5432 bytes
font_01_sfnt_off00008421.bin
a793e10ecb4a13a28b0ed982f8c2314195320cd7b1e1f19237529f703221317a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8421 10292 bytes
font_02_sfnt_off0000a78b.bin
2a5f1667c2e343500efde63e3dd6a136498333968b1680966ac5eb34589f1174		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA78B 16144 bytes

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