Malicious PDF — malware analysis report

Static analysis result for SHA-256 654ef5810085823c…

MALICIOUS

PDF

42.8 KB Created: 2020-08-20 06:49:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56cfb2fba1298be8214a204978e89495 SHA-1: d80a6c91dfce6233a3531350d76119462a89cf0b SHA-256: 654ef5810085823cb88dfb0bedde72d428aedde0f6e00939ad3788e1ce7b8194
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text suggesting a lure related to a game mod, and the PDF_SEO_LINK_FARM heuristic indicates a large number of generated links. 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.cc/pify?keyword=naruto+ninja+blazing+mod+apk
    • http://ruzawiw.bsgmeetingsllc.com/uploads/1/3/1/8/131871509/pefetuwazebabab.pdf
    • http://files.vallejohardtops.com/uploads/1/3/0/9/130969545/nutazo.pdf
    • http://files.jaycountyrobotics.com/uploads/1/3/2/6/132681409/rutopozuged_wobabujamajepu_zodimewuxive.pdf
    • http://remavevan.en.skandiaorgeln.com/uploads/1/3/1/4/131438304/besasuso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1760/9122/files/dituguvagidodagasakadubil.pdf
    • https://cdn.shopify.com/s/files/1/0440/8786/9592/files/fuwuguwanezenuk.pdf
    • https://cdn.shopify.com/s/files/1/0440/8344/5925/files/mercado_cervantino_2019.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/19907745965.pdf
    • https://cdn.shopify.com/s/files/1/0431/6214/0840/files/32185734321.pdf
    • https://cdn.shopify.com/s/files/1/0431/3376/3746/files/lununilagugapelobunux.pdf
    • https://cdn.shopify.com/s/files/1/0432/6418/0390/files/57095299257.pdf
    • https://cdn.shopify.com/s/files/1/0440/7967/7590/files/insertion_sort_haskell.pdf
    • https://cdn.shopify.com/s/files/1/0430/8644/6746/files/chemistry_lab_manual_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/5317/9289/files/ferariw.pdf
    • https://cdn.shopify.com/s/files/1/0437/0553/2569/files/lowovesezomatak.pdf
    • https://cdn.shopify.com/s/files/1/0431/4012/0733/files/alfabeto_font_style.pdf
    • https://cdn.shopify.com/s/files/1/0429/8178/5753/files/gunaviwowupos.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_off000069e0.bin
6f57d927944541f9d218d9a945db8868f2c4db8229a4f553711394d82742660e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69E0 5400 bytes
font_01_sfnt_off00007c2f.bin
89ec1f74469d736dd1f4aa1fb0453d39d41a2300c947f3aaa73b91c778f58ec7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C2F 9876 bytes

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