Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cedff30366be50c…

MALICIOUS

PDF

56.9 KB Created: 2020-08-07 14:16:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d9198952e3037f6edeb811ae8f35404 SHA-1: baad9befd5c89d174900f966e86a2857a6ebc58a SHA-256: 1cedff30366be50c8a6a4e5ee9598a840b3a0185ecfbbaada26f3f8d6670a739
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a significant number of embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body itself is heavily obfuscated and contains a URL that points to a redirector service, likely to obscure the final malicious destination. The ML classifier also strongly flagged this PDF as malicious.

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=bauman+liquid+modernity+pdf
    • http://zokujog.rochin.com/uploads/1/3/2/7/132712615/7847183.pdf
    • http://files.jlinco.com/uploads/1/3/1/4/131437385/jomononamisigoxiguj.pdf
    • http://files.littletonpreschool.com/uploads/1/3/0/7/130739826/boxafabenupe-vageziril-vofafunufob.pdf
    • http://pakitoka.sarkakocicka.net/uploads/1/3/1/0/131070786/sorarilini.pdf
    • http://fulibopu.saintsandscholars.org/uploads/1/3/1/4/131438142/8740159.pdf
    • https://cdn.shopify.com/s/files/1/0432/3262/4808/files/39853960890.pdf
    • https://cdn.shopify.com/s/files/1/0430/5397/3657/files/learning_guitar_scales.pdf
    • https://cdn.shopify.com/s/files/1/0430/6763/7922/files/zajexusiwexosiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/2509/7126/files/75658407487.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98029452840.pdf
    • https://cdn.shopify.com/s/files/1/0434/4902/4669/files/vivaxebogipifukido.pdf
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/gibetufakimomojot.pdf
    • https://cdn.shopify.com/s/files/1/0430/6590/1210/files/speak_now_2.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/52408467897.pdf
    • https://cdn.shopify.com/s/files/1/0431/4896/8090/files/20320102086.pdf
    • https://cdn.shopify.com/s/files/1/0429/8162/1919/files/vozixufasatepefizetaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/4157/0466/files/ethical_hacking_books_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/3692/6374/files/66535471193.pdf
    • https://cdn.shopify.com/s/files/1/0431/9808/7328/files/kotikavutupowutusod.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008a33.bin
72b0fa3643e6b2c03d35b6af9e6d32b647e7c009393a0aa148ad308a20466d10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A33 5284 bytes
font_01_sfnt_off00009c1d.bin
f2ee20bab43e933326ceb9b41f0f5a937fc292bcc6421f2b0577b3a63eb8ef2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C1D 9972 bytes
font_02_sfnt_off0000be52.bin
f6ba3377c17f859463389fbde791eca02192895cff6f2275851430cf545e3289		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE52 16836 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.