Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ad19e82b00ef6ce…

MALICIOUS

PDF

38.8 KB Created: 2020-07-20 16:33:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c261a3da81182d41665b9713fbaf0d0 SHA-1: 6a36da6075c9f0e22650350bbff91675835952c5 SHA-256: 0ad19e82b00ef6ce4b25e00f1319712570e049e32919effde7af9ed46568ba14
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to what appears to be a link farm designed to attract users with keywords like 'nonton indoxxi hd apk'. One of the primary links, 'https://ttraff.cc/pify?keyword=nonton+indoxxi+hd+apk', is identified as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body is heavily obfuscated, but the presence of embedded URLs and the heuristic firings strongly suggest a phishing or redirection attack.

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.cc/pify?keyword=nonton+indoxxi+hd+apk
    • http://files.grasshoppervapesllc.com/uploads/1/3/0/7/130739480/zuwapizunez.pdf
    • http://files.easyfyinow.com/uploads/1/3/2/6/132695416/bebexesifofo.pdf
    • http://files.neuralmechanisms.org/uploads/1/3/1/4/131437822/7309885.pdf
    • http://files.eyexlife.com/uploads/1/3/1/3/131398235/5739642.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/muzaloxebomasu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6308/3162/files/nubedinudesoraxonej.pdf
    • https://cdn.shopify.com/s/files/1/0434/3883/3816/files/gokopadizef.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/vojuratetimapajenuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/0180/6997/files/nifez.pdf
    • https://towaxoveg.files.wordpress.com/2020/07/gatifugizobeziza.pdf
    • https://zobivebexif.files.wordpress.com/2020/07/zepan.pdf
    • https://latobaxafepe.files.wordpress.com/2020/06/75342096084.pdf
    • https://jogapodu.files.wordpress.com/2020/06/pejofajoxapigir.pdf
    • https://pobizabaj.files.wordpress.com/2020/06/42741894355.pdf
    • https://cdn.shopify.com/s/files/1/0430/5531/7149/files/17137257979.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/zimudawarejezibif.pdf
    • https://cdn.shopify.com/s/files/1/0430/6377/1293/files/melagomunive.pdf
    • https://cdn.shopify.com/s/files/1/0431/1223/5174/files/komisar.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78030006053.pdf
    • https://cdn.shopify.com/s/files/1/0432/9121/3988/files/bovav.pdf
    • https://cdn.shopify.com/s/files/1/0432/7279/8373/files/77351442558.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_off00005bf2.bin
f54425cd39d03a87038001ed11b21fb7acaca9a594005d62ff2e3b29f11c400e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF2 4512 bytes
font_01_sfnt_off00006b39.bin
5298c53d9e2088d0874e99fe403c21aaee52cf926af744cd3cbe71b7c3f77647		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B39 10388 bytes

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