Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc2346983e7534ad…

MALICIOUS

PDF

54.7 KB Created: 2020-08-05 23:24:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de69e8e6373e2ef4a38473b24c1ee4ae SHA-1: 82bad0450e7f2a436d4ef7a5c4debdc18fb63833 SHA-256: fc2346983e7534ad3e6e3a47536d3075184025e68009041982853752801f5b16
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous links, including one that redirects to malicious infrastructure via ttraff.com. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=machine+learning+definition+pdf, suggesting a lure to disguise the malicious redirection. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the presence of a link to known malicious redirector infrastructure. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, many hosted on cdn.shopify.com, likely to improve search engine ranking for malicious content.

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=machine+learning+definition+pdf
    • http://files.eclipseoverroswell.com/uploads/1/3/0/7/130775129/vobozez_favur_panevoxamowibab_fedikabuwilalo.pdf
    • http://files.gregsmolka.com/uploads/1/3/1/1/131164312/jonoke_fusuvaru_wogotepimeg_rugoperijasenu.pdf
    • http://files.newageofheroes.com/uploads/1/3/1/3/131397971/1314044.pdf
    • http://domedef.nancymurphyonline.com/uploads/1/3/1/3/131383651/2899558.pdf
    • http://files.giuseppemanzillo.com/uploads/1/3/1/6/131606652/mizumuji-duturivuri-jikep.pdf
    • https://cdn.shopify.com/s/files/1/0435/0171/5622/files/kirideninokitito.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23342697578.pdf
    • https://cdn.shopify.com/s/files/1/0432/7089/7824/files/8472556066.pdf
    • https://cdn.shopify.com/s/files/1/0432/4121/0024/files/40204933347.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/kifumenurafijoj.pdf
    • https://cdn.shopify.com/s/files/1/0438/4368/2469/files/xikusaforuzorotokon.pdf
    • https://cdn.shopify.com/s/files/1/0430/0511/6575/files/sevidikujididipot.pdf
    • https://cdn.shopify.com/s/files/1/0430/0672/2211/files/rezupiz.pdf
    • https://cdn.shopify.com/s/files/1/0449/6100/5736/files/ebook_reader_fr_test.pdf
    • https://cdn.shopify.com/s/files/1/0430/0092/2261/files/59034029354.pdf
    • https://cdn.shopify.com/s/files/1/0435/8746/9471/files/9218754146.pdf
    • https://cdn.shopify.com/s/files/1/0429/1434/9219/files/molejetosagikowago.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
stream_005_off0000b3d0.bin
5ac0869de4b13a56fff1e4e930df168a20f58c1165db14351f51a4b87100d98f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB3D0 17440 bytes
font_00_sfnt_off00007da5.bin
9a0b05460841aa7f1cb9f0982a5613887d054ef07bea1226854bf8f17874b3fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA5 5244 bytes
font_01_sfnt_off00008f82.bin
9c968b00271f7c24ddd4757f8c557eecf86acb325622844b31e3f14de75570d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F82 10576 bytes

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