Malicious PDF — malware analysis report

Static analysis result for SHA-256 635d7124781d6e76…

MALICIOUS

PDF

41.9 KB Created: 2020-08-29 17:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f6d3cc9a169452f31322209a3d097a0 SHA-1: 7bd35d730ed79b0882e81e072c10a72f0aa488bb SHA-256: 635d7124781d6e7688d0b8814a12c8f443d9b733f4270ab814245fd033cfa1f2
154 Risk Score

Malware Insights

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

The PDF contains a prominent link and document body text that promises to 'Hack instagram password without human verification'. This link, 'https://ttraff.cc/wix?keyword=hack+instagram+password+without+human+verification', is flagged as a malicious redirector. The document also contains a large number of embedded links to PDFs hosted on shopify.com, likely part of a link farm to improve search engine ranking for the malicious lure. The ML classifier strongly indicated maliciousness.

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=hack+instagram+password+without+human+verification
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/3525/5203/files/git_create_remote_branch.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/guwefizezomofolevaret.pdf
    • https://cdn.shopify.com/s/files/1/0430/8061/4041/files/98978721675.pdf
    • https://static.usrfiles.com/ugd/bd5c68_766c3b4ddd134387bfd4305a97b36ac8.pdf
    • https://static.usrfiles.com/ugd/b8c837_8c683f470e8d4d2c9afb00afbd6570fe.pdf
    • https://static.usrfiles.com/ugd/b8c837_75ed564457b34c5e8690dc0bf2ea4346.pdf
    • https://static.usrfiles.com/ugd/b8c837_e152ae9b6e3b4857980a9bbd5936e161.pdf
    • https://static.usrfiles.com/ugd/b8c837_01f2fd2444b2434586ba0b0969919ead.pdf
    • https://static.usrfiles.com/ugd/b8c837_cf53d8e365f34b8cb2a280aba733265a.pdf
    • https://static.usrfiles.com/ugd/e32576_f706680d522348d5b5340dd693da40df.pdf
    • https://static.usrfiles.com/ugd/b8c837_2b363495922c452ab8eaccb36b669e41.pdf
    • https://static.usrfiles.com/ugd/b8c837_73a997d589bb4aad9a06a1fbfdf871ed.pdf
    • https://static.usrfiles.com/ugd/455f95_510cc1d8c82e4691b7ff42f8053ba8c4.pdf
    • https://cdn.shopify.com/s/files/1/0432/5415/3371/files/lurirakerub.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2454/files/linukato.pdf
    • https://cdn.shopify.com/s/files/1/0437/1814/8247/files/37167567759.pdf
    • https://cdn.shopify.com/s/files/1/0429/6019/1651/files/jotujelatumakaba.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_off000063c2.bin
76aff9969d65a9b90a98d04910ad4c80f2518bed97b24d0df65a0c2fb32e36ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63C2 5712 bytes
font_01_sfnt_off0000771e.bin
20e0d16cd3302eb925a6b9d52e61831aafddb1cd53d048d9ce31a9b29c728545		 pdf-font-stream PDF embedded font (sfnt) at offset 0x771E 10372 bytes

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