Malicious PDF — malware analysis report

Static analysis result for SHA-256 4772dc07642f284b…

MALICIOUS

PDF

44.9 KB Created: 2020-08-19 07:53:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc7172d8df8630a64c4335446bfe9b0e SHA-1: fac5b50922f9ca02176a1d194ca29552c97d8066 SHA-256: 4772dc07642f284bb590d71718eca4d1a33f235bb61245d742d94f1f3aecff0a
152 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious and contains a critical heuristic indicating it links to known malicious redirector infrastructure. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, one of which points to a suspicious domain. The document body, though partially corrupted, contains references to the malicious redirector URL and several other URLs hosted on Shopify and other domains, suggesting a broad distribution attempt.

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=capability+index+pdf
    • http://tagawop.micheledvicino.com/uploads/1/3/2/6/132695471/dabivuvamivetasope.pdf
    • http://files.dixielandbandorlando.com/uploads/1/3/0/9/130969825/romov.pdf
    • http://files.othersideofeverything.com/uploads/1/3/0/8/130814216/povetitajax.pdf
    • https://cdn.shopify.com/s/files/1/0432/0067/5995/files/jikudesowisuravozofufiruz.pdf
    • https://cdn.shopify.com/s/files/1/0434/5099/0753/files/2019_anime_games_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0439/0476/2011/files/zowoteniregimi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0219/1269/files/61491624721.pdf
    • https://cdn.shopify.com/s/files/1/0428/9812/9059/files/37995411358.pdf
    • https://cdn.shopify.com/s/files/1/0434/4869/6993/files/arabic_movies_free_full_version.pdf
    • https://cdn.shopify.com/s/files/1/0439/8533/8526/files/jeep_wrangler_parts_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2122/files/depar.pdf
    • https://cdn.shopify.com/s/files/1/0428/8000/8359/files/canterbury_tales_prologue_modern_english.pdf
    • https://cdn.shopify.com/s/files/1/0435/8039/1585/files/xutemiborinenemeju.pdf
    • https://cdn.shopify.com/s/files/1/0435/1157/8776/files/buliwowifagafa.pdf
    • https://cdn.shopify.com/s/files/1/0428/1165/4307/files/beowulf_translation.pdf
    • https://cdn.shopify.com/s/files/1/0431/3071/6326/files/5909116301.pdf
    • https://cdn.shopify.com/s/files/1/0430/7697/6791/files/zimadejizikexanatexot.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_off0000641d.bin
0527c87727870e081fcc90b4040c8fd1b082d216c813aefef9a03691e405b3a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x641D 4976 bytes
font_01_sfnt_off00007523.bin
4b2f2155acf36e14edff48538e350f6dfcf431487b9fa9a05f2ca98d96d623b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7523 16056 bytes

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