Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dbcae7d7131718c…

MALICIOUS

PDF

39.1 KB Created: 2020-07-24 10:09:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9cf1a44755cc16c392f7b4dadb16ee8d SHA-1: 3a9925ecc24e6e0e94602c2162311aad0d835d67 SHA-256: 0dbcae7d7131718ce29fc49a6c7e95abfc524a1d3a31872d37e4933f6b5bd011
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector, and is flagged by ML classifiers as malicious. The document body, though partially corrupted, suggests a lure related to merging PDF files, which is a common tactic for phishing or distributing further malware. The presence of embedded URLs and the heuristic firings strongly indicate an attempt to redirect users to malicious infrastructure.

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.ru/wb?keyword=merge%202%20pdf%20file%20online
    • http://files.lisassalonspa.com/uploads/1/3/1/1/131164386/c5a30427.pdf
    • http://files.sonjayounger.com/uploads/1/3/0/7/130775053/wotawap_mikusiperi_navazamumusu.pdf
    • http://files.schoolpatio.com/uploads/1/3/2/7/132740415/6232202.pdf
    • http://files.ersterkindergarten.com/uploads/1/3/1/4/131437318/1489915.pdf
    • http://files.myperformance.co.nz/uploads/1/3/0/7/130740609/pisujivif_zukofatuled_dewowudaraniwa_tikenas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5188/4445/files/bopofimevaboxuratumi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/vewafapuzidelezufi.pdf
    • https://cdn.shopify.com/s/files/1/0428/8253/1481/files/30811499851.pdf
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/10494406014.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/93899428267.pdf
    • https://cdn.shopify.com/s/files/1/0438/3339/3309/files/29266849034.pdf
    • https://cdn.shopify.com/s/files/1/0430/7232/3737/files/12974135208.pdf
    • https://cdn.shopify.com/s/files/1/0429/5950/3519/files/zexevujexeliruzam.pdf
    • https://cdn.shopify.com/s/files/1/0430/9732/5732/files/34157731756.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9076/files/14641461812.pdf
    • https://cdn.shopify.com/s/files/1/0433/3119/0952/files/25206011022.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/sifupinujesunemalirafizu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6834/8830/files/jiteximupese.pdf
    • https://cdn.shopify.com/s/files/1/0433/0536/9768/files/xomosobogof.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_off00005d11.bin
38019a0ef1725e73a9b4a5b899fdc8b7498ae0eb80b43b165a07f716ef0c92d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D11 4668 bytes
font_01_sfnt_off00006cfb.bin
349c14658487d68aeac6773c94320139bc3ea1cae60d77c04ed42a5765a3706f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CFB 9988 bytes

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