Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f018fcf6935f7ef…

MALICIOUS

PDF

45.8 KB Created: 2020-08-31 06:11:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c408895896145520d9a75f5dbe612145 SHA-1: 58c884546bd339974259978bcc1fbbb766004786 SHA-256: 0f018fcf6935f7ef0824cbad30c7fe40438ca8d513ee6c9c461f70b0e5d141eb
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The document body text, though heavily obfuscated, contains a URL that matches the primary malicious redirector. This suggests the document is designed to drive traffic to malicious sites, likely for phishing or malware distribution.

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=gratis+jenna+jamerson+porno
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_2bc9f02fb3f44690aa5f951b8747ba9e.pdf
    • https://static.usrfiles.com/ugd/dc98cc_59da795808464bf28c26cee45bd45f0e.pdf
    • https://static.usrfiles.com/ugd/74e905_5f82d6f4842f4e5e8a068e0e63b8c4d8.pdf
    • https://static.usrfiles.com/ugd/e2f197_9febf7eb8259459ab38f10f2e9b76253.pdf
    • https://cdn.shopify.com/s/files/1/0429/9322/1783/files/pozukosukuf.pdf
    • https://cdn.shopify.com/s/files/1/0434/4745/1798/files/amsco_apush_chapter_11_multiple_choice_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/9928/2845/files/22245849768.pdf
    • https://static.usrfiles.com/ugd/b8c837_d9d6be1a28a548239a37b2455aadb723.pdf
    • https://static.usrfiles.com/ugd/ac51ce_06b05c2a29c843f1aa4c2caf6fe7778b.pdf
    • https://static.usrfiles.com/ugd/834936_2d1331ffe06e4ba4b7aceb1f85a53941.pdf
    • https://static.usrfiles.com/ugd/0a0016_66802fca619747db99dc676234ba958c.pdf
    • https://static.usrfiles.com/ugd/906e9f_df75a3ebbecf4bf9ac2cc54a363694eb.pdf
    • https://static.usrfiles.com/ugd/2e16aa_017887fa5ab348c9ab351cc1641c62ea.pdf
    • https://static.usrfiles.com/ugd/576447_bfd5b37e83094bcdbc0b0f9e54582d8c.pdf
    • https://static.usrfiles.com/ugd/d01287_64f8a7254689466f965f31484b8f2c24.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_off00007619.bin
1749bb778a9698ca5219eb720f8ad0d7e1d5e2c37443b23bded85bb459afb648
pdf-font-stream PDF embedded font (sfnt) at offset 0x7619 5040 bytes
font_01_sfnt_off0000872d.bin
fbdcb1091fb28bc9287805516e95e7bc0fdcb676db5cd0fd0a3d7e05b804e9e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x872D 10488 bytes