Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d883f0e74d81765…

MALICIOUS

PDF

44.6 KB Created: 2020-08-29 19:26:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a44bc851efb2d2f892fa0c4f076a152 SHA-1: 0fdc4bcbea60b1032cf39e6981a993888813cc71 SHA-256: 3d883f0e74d817655ba4c6f3fd79331ce63a8febebb23b476ebd0c2704019729
152 Risk Score

Malware Insights

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

The PDF file contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for free PDF books, combined with the malicious URL. This suggests a phishing or social engineering attack aimed at redirecting users to malicious sites.

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/wix?keyword=livres+gratuits+en+francais+pdf
    • https://cdn.shopify.com/s/files/1/0433/6569/5638/files/kawasaki_mule_3010_service_manual_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/0858/1019/files/dugir.pdf
    • https://cdn.shopify.com/s/files/1/0440/2121/9493/files/sedodaxoxozomowegekisular.pdf
    • https://cdn.shopify.com/s/files/1/0446/0825/8211/files/fundamentos_agricultura_biodinamica.pdf
    • https://cdn.shopify.com/s/files/1/0433/1352/8987/files/apache_beam_tutorial.pdf
    • https://static.usrfiles.com/ugd/b8c837_a15698461949425ba97419a8af38fb4a.pdf
    • https://static.usrfiles.com/ugd/b8c837_71205bbc53eb4b099c60c9424b31e795.pdf
    • https://static.usrfiles.com/ugd/b8c837_ffb888ccdff74888b90bfa85a1dd202f.pdf
    • https://static.usrfiles.com/ugd/b8c837_acc0d9c00c1646f6ac83b160b2d77bd1.pdf
    • https://cdn.shopify.com/s/files/1/0428/6719/6063/files/wudarufadamag.pdf
    • https://cdn.shopify.com/s/files/1/0440/6083/6005/files/32939942471.pdf
    • https://static.usrfiles.com/ugd/b8c837_0688a98e90d147f7aaff97830ee47aa0.pdf
    • https://static.usrfiles.com/ugd/b8c837_baae777784bb4397a14ffd8809009b05.pdf
    • https://static.usrfiles.com/ugd/b8c837_b990027b51764463bd2c0b63f04a42d4.pdf
    • https://static.usrfiles.com/ugd/b8c837_810a458af2784d059a46912b4c272261.pdf
    • https://static.usrfiles.com/ugd/b8c837_bd283b680f7540edaa1e482e831b5bc9.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cdd.bin
093864febab424ee845d7060aea51d494c422931f3cfb91797c2f046d6100452
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CDD 5292 bytes
font_01_sfnt_off00007ef6.bin
de8193ea19ca0f474ec2fbcc69a9591749ad3b1c754ab20f112804f758c445bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF6 11712 bytes