Malicious PDF — malware analysis report

Static analysis result for SHA-256 606e3432729b34ac…

MALICIOUS

PDF

43.7 KB Created: 2020-08-15 18:43:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae2e432f2c934cc78a2a23dd5403c063 SHA-1: 2b5aa7473d77ee57b19bb4f8bc399f46abf94708 SHA-256: 606e3432729b34ac7a57dfb157c540780153aaf577b2b8ef2aca8bdef08ddc5f
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to obscure a malicious redirector. The primary malicious URL identified is ttraff.ru, which is known to host malicious content. The document body, though heavily obfuscated, contains references to 'Comptia cloud study guide pdf download', suggesting a lure to trick users into downloading further malicious content.

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.ru/wb?keyword=comptia%20cloud+%20study%20guide%20pdf%20download
    • http://files.nancyfarmerwebsite.com/uploads/1/3/0/9/130970001/tapubowimujux.pdf
    • http://pawelu.maid4uae.com/uploads/1/3/0/7/130738847/e3f75.pdf
    • http://duzafox.theskinandlashlady.com/uploads/1/3/0/7/130738647/jipowikuvi.pdf
    • http://files.eddconwaycoaching.com/uploads/1/3/1/3/131398555/a5ff1a8.pdf
    • http://files.wowvt.com/uploads/1/3/2/6/132695682/c5591c535772d3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2884/8538/files/53552731006.pdf
    • https://cdn.shopify.com/s/files/1/0434/8618/3577/files/blank_2020_calendar_printable.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/nujawodedemi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5981/4306/files/80495591692.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8973/files/55318317915.pdf
    • https://cdn.shopify.com/s/files/1/0430/8166/2628/files/47544047542.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/gerawulizonolamav.pdf
    • https://cdn.shopify.com/s/files/1/0433/4908/2261/files/75152430949.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vinufew.pdf
    • https://cdn.shopify.com/s/files/1/0434/8860/8418/files/zuzeveri.pdf
    • https://cdn.shopify.com/s/files/1/0430/0662/3903/files/jane_eyre_bronte_charlotte.pdf
    • https://cdn.shopify.com/s/files/1/0432/8056/4392/files/westlife_i_have_a_dream_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0433/6589/2261/files/tesobokedar.pdf
    • https://cdn.shopify.com/s/files/1/0431/6663/0050/files/bamasufigarekib.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b20.bin
b05bd7b73c00f73345f514ffde8758440d9d72523709e61d35a4296f185d4843		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B20 5480 bytes
font_01_sfnt_off00007dc6.bin
87e2fc87db01f4b49d7a889871b782ce900fb9b40428afd474f96bd89791fa15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC6 10704 bytes

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