Malicious PDF — malware analysis report

Static analysis result for SHA-256 5739856fa5a0685c…

MALICIOUS

PDF

48.3 KB Created: 2020-08-11 22:59:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc82a6e1344e97ec07161da561b13bf8 SHA-1: 2d488aa637a8d3838eab60bff85282a96adbbe8b SHA-256: 5739856fa5a0685c2b44afc6eee84d584ce1902c8a2133654ab50455dcec639d
152 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier and contains multiple embedded URLs. One URL, 'https://ttraff.cc/wb?keyword=nuages%20gris%20liszt%20pdf', is identified as a known malicious redirector. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm intended to obscure the ultimate destination and potentially distribute malicious content or engage in phishing. No scripts were extracted, but the PDF structure and embedded links strongly indicate a malicious redirection 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.cc/wb?keyword=nuages%20gris%20liszt%20pdf
    • http://files.memorybengesa.org/uploads/1/3/1/8/131871650/turobuwupalafo.pdf
    • http://files.belarte-ardeco.com/uploads/1/3/1/3/131384777/safoginonolelag.pdf
    • http://files.littlegemscreations.com/uploads/1/3/0/8/130874122/907901.pdf
    • https://cdn.shopify.com/s/files/1/0445/6543/0431/files/cfp_exam_prep.pdf
    • https://cdn.shopify.com/s/files/1/0433/8286/6083/files/5734798429.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/38140124426.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/44915423589.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/nirugotijatenovufifeja.pdf
    • https://cdn.shopify.com/s/files/1/0434/2710/2876/files/wagusuwuxelosowoputa.pdf
    • https://cdn.shopify.com/s/files/1/0434/3886/6593/files/dosep.pdf
    • https://cdn.shopify.com/s/files/1/0429/6579/4965/files/69038133435.pdf
    • https://cdn.shopify.com/s/files/1/0436/0326/3650/files/89828039154.pdf
    • https://cdn.shopify.com/s/files/1/0431/8537/3333/files/fozomixupilalutazor.pdf
    • https://cdn.shopify.com/s/files/1/0437/6992/1688/files/da_form_3349_fillable.pdf
    • https://cdn.shopify.com/s/files/1/0429/7719/8229/files/xajasesirozotoro.pdf
    • https://cdn.shopify.com/s/files/1/0434/0737/6546/files/vukupowelemumurazojita.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
font_00_sfnt_off00006649.bin
98a51f99cd6ac000b394ef9afdb55fc10cb666ff1a483547688115ac599b14b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6649 4052 bytes
font_01_sfnt_off000074a4.bin
fc5131077d6083c4cd20acbf7bb2a7067fe094bbd9d319d2ad95914f56564cc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74A4 5228 bytes
font_02_sfnt_off00008685.bin
8967882f1879c70fdf38893b5578eac839af53c91381bb3f30fd62dbbd46b3c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8685 13704 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.