Malicious PDF — malware analysis report

Static analysis result for SHA-256 03b8556a4de253ca…

MALICIOUS

PDF

49.7 KB Created: 2020-08-27 21:05:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d9ed440b798e6926c464bb6229bb547 SHA-1: 0ccce804b3394002fbd90c1161d78c6a8bff7c3d SHA-256: 03b8556a4de253ca203620dbe909cc7043a00250dcfd1d95c42b2b3b5043b974
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL https://ttraff.me/pify?keyword=nusoap+con+laravel, which is likely used to redirect users to a malicious site. The presence of numerous links suggests a link farm or phishing attempt.

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.me/pify?keyword=nusoap+con+laravel
    • http://files.cloudtelephone.net/uploads/1/3/1/6/131607103/8268822.pdf
    • http:///api?wsdl
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9314/8313/files/47199347651.pdf
    • https://cdn.shopify.com/s/files/1/0432/1250/5256/files/seberepitopuninagirax.pdf
    • https://cdn.shopify.com/s/files/1/0430/3663/9395/files/8k_wallpaper_for_laptop.pdf
    • https://cdn.shopify.com/s/files/1/0432/8236/6629/files/jidewaxogurenaki.pdf
    • https://cdn.shopify.com/s/files/1/0432/3672/0798/files/mejuxorofewijokokefox.pdf
    • https://cdn.shopify.com/s/files/1/0428/3033/2060/files/phonics_for_reading.pdf
    • https://cdn.shopify.com/s/files/1/0464/6322/1912/files/81979929832.pdf
    • https://cdn.shopify.com/s/files/1/0435/3789/1477/files/womifibuxalepameduguw.pdf
    • https://cdn.shopify.com/s/files/1/0460/2920/9759/files/mandated_reporter_training_requirements_california.pdf
    • https://cdn.shopify.com/s/files/1/0428/4035/9068/files/xijovakozejeba.pdf
    • https://cdn.shopify.com/s/files/1/0438/1127/4914/files/47196926018.pdf
    • https://cdn.shopify.com/s/files/1/0432/5238/3907/files/yoga_asana_postures.pdf
    • https://cdn.shopify.com/s/files/1/0436/4517/3910/files/vifokuwufijoxenenizozefu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000725d.bin
c1403146efcda9a3eb7d7feb956b3a2daac96162a950d1c3041d53224692231f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x725D 4956 bytes
font_01_sfnt_off00008346.bin
f0b8215b8534b75992afdb4ec037b4d11b91a611e8662fa43ab82c07b76fbb05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8346 3372 bytes
font_02_sfnt_off00009109.bin
84dd27448ef21c9593babda016133c4aa7c141d0fe00c6f69c5f8fae93473eed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9109 12188 bytes

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