Malicious PDF — malware analysis report

Static analysis result for SHA-256 1197829051ca9192…

MALICIOUS

PDF

40.7 KB Created: 2020-08-28 21:17:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 311bd6058b0f6ac647e31009d5850ca6 SHA-1: 78daa51465a513b91eac3d93ec3486635568c521 SHA-256: 1197829051ca91923d4875db847f975f5f32a77bb66719c8cc4a4ba63b0a491b
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm strategy, aiming to attract traffic through SEO tactics. The ML classifier strongly indicated maliciousness, and the presence of a redirector URL suggests an attempt to lead the user to a malicious site for phishing or further payload delivery.

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/wix?keyword=r2d2+interactive+droid+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://cdn.shopify.com/s/files/1/0437/9105/7058/files/gogebumulediponitites.pdf
    • https://cdn.shopify.com/s/files/1/0435/8461/8653/files/burajozesukugone.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/5989/files/yamaha_fjr1300_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/1592/8997/files/wozebuzujal.pdf
    • https://cdn.shopify.com/s/files/1/0434/0292/0086/files/statistics_for_engineers_and_scientists_navidi.pdf
    • https://cdn.shopify.com/s/files/1/0436/6021/4425/files/how_to_learn_arabic_alphabet.pdf
    • https://cdn.shopify.com/s/files/1/0435/4624/7332/files/vozadiromejebefaxizujudeb.pdf
    • https://cdn.shopify.com/s/files/1/0434/4414/2245/files/csat_2020_answer_key.pdf
    • https://static.usrfiles.com/ugd/b8c837_cf7e75be42e84fb39461b4b2bf6d0847.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5c65ece9ec046d9ac3410bf74d08111.pdf
    • https://static.usrfiles.com/ugd/b8c837_da61417200a94ceba3db15df1b75b394.pdf
    • https://static.usrfiles.com/ugd/b8c837_e17292eb6db1468bb6f5aa040c921649.pdf
    • https://static.usrfiles.com/ugd/b8c837_e4a94a6ddf6d452cbc41c039b8f8e669.pdf
    • https://static.usrfiles.com/ugd/b8c837_06f4b874ea354103be66a26c2c57c641.pdf
    • https://static.usrfiles.com/ugd/b8c837_e205eb3363e2408e819946be9afc4edc.pdf
    • https://static.usrfiles.com/ugd/b8c837_e32663d164b94940a19c6eeb3fa24506.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://www.gnu.org/licenses/gpl.html

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051f9.bin
830c8a4a73084ca158bd63c9fd7b5cb840dd69485cfee91034942fa9fabf1d2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51F9 5108 bytes
font_01_sfnt_off00006331.bin
7a02da73c5ff24218d04b188db7d31ceb9303d5dedd43b645f18a615a19d9b6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6331 6068 bytes
font_02_sfnt_off000072e2.bin
6d87fe062572275dcad9041c41021581c43e829c5e07e91a97c6fead1065e66b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72E2 10260 bytes

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